The Fall of Constantinople  was the capture of the capital of the Byzantine Empire by an invading Ottoman army  on 29 May 1453. The attackers were commanded by the then 21-year-old Sultan Mehmed II, who defeated an army commanded by Emperor Constantine XI Palaiologos and took control of the imperial capital, ending a 53-day siege that had begun on 6 April 1453. After conquering the city, Sultan Mehmed transferred the capital of his Empire from Edirne to Constantinople, and established his court there. The capture of the city  marked the end of the Byzantine Empire, a continuation of the Roman Empire, an imperial state dating to 27 BC, which had lasted for nearly 1,500 years. The conquest of Constantinople also dealt a massive blow to Christendom, as the Muslim Ottoman armies thereafter were left unchecked to advance into Europe without an adversary to their rear. It was also a watershed moment in military history. Since ancient times, cities had used ramparts and city walls to protect themselves from invaders, and Constantinople's substantial fortifications had been a model followed by cities throughout the Mediterranean region and Europe. The Ottomans ultimately prevailed due to the use of gunpowder . The conquest of the city of Constantinople and the end of the Byzantine Empire was a key event in the Late Middle Ages which also marks, for some historians, the end of the Medieval period.

What was a key factor in the ottoman empire prevailing over Constantinople's fortifications?
A: Since ancient times, cities had used ramparts and city walls to protect themselves from invaders, and Constantinople's substantial fortifications had been a model
Q: Richard Gabriel estimated that roughly 2,400 PLO fighters were killed during the war, of whom about 1,400 were killed throughout southern Lebanon and another 1,000 killed during the Siege of Beirut. Gabriel also estimated that between 5,000 and 8,000 civilians died during the war. Some later estimates have put the total figure at 18-19,000 killed and more than 30,000 wounded, most of them civilians. 80% of villages in South Lebanon were damaged, with some completely destroyed. The Israeli government maintained that about 1,000 Palestinian fighters and 800 Lebanese civilians died during the invasion, excluding the siege of Beirut. Kenneth Pollack estimated that 1,200 Syrian soldiers were killed and about 3,000 wounded during the war.
How many more PLO fighters were killed throughout southern Lebanon than during the Siege of Beirut?

A: 400
P: Sohn, competing for the Empire of Japan, won the gold medal at the 1936 Summer Olympics in the marathon. He ran the 42.195 kilometres  course in 2:29:19.2, breaking the Olympic record. His Korean teammate Nam Sung-yong took the bronze medal. As Korea was under Japanese occupation at the time, the International Olympic Committee  officially credited Japan with Sohn's gold and Nam's bronze in the 1936 Summer Olympics medal count. On December 9, 2011, the IOC recognized Sohn's Korean nationality in his official profile. It cited his efforts to sign his Korean name and stressing Korea's status as a separate nation during interviews. The move was part of the Korean Olympic Committee's repeated requests to acknowledge Sohn's background. However, the IOC ruled out changing the nationality and registered name per official records to prevent historical distortions.
Answer this: How many years has Japan held the medal count for Sohn and Sung-yong?

A: 82
Problem: The game started out slow for both the Texans and Chiefs, but with Kansas City poised to score first, rookie placekicker Justin Medlock missed a 30-yard field goal. The Texans used their second possession to advance to the red zone, but a pass from Matt Schaub intended for Andre Johnson was intercepted by Chiefs safety Jarrad Page in the end zone. Beginning the second quarter, Chiefs center Casey Wiegmann fumbled the ball, but it was recovered by quarterback Damon Huard. After a possession by the Texans, kick returner Eddie Drummond fumbled and the ball was recovered by Houston. The Texans capitalized on the turnover and scored first through a field goal. With just over six minutes left in the half, Matt Schaub completed a 77-yard pass to Andre Johnson, and the Texans secured their lead, 10-0. Beginning the third quarter, Chiefs fullback Kris Wilson appeared to have fumbled the football, although it was disputed whether or not he had possession. The fumble was recovered by Texans defensive end Mario Williams for a touchdown. The Chiefs finally scored, through a field goal, with thirty seconds remaining in the third quarter. For the first ten minutes of play in the fourth quarter, the Texans controlled the ball and kept the Chiefs' offense off the field. When the Chiefs received their first chance to score in the fourth quarter with just over five minutes remaining, they failed to capitalize on offense. For only the second time in Texans history, the franchise won their opening day game as the Chiefs began their season at 0-1. The Chiefs' Eddie Kennison pulled his hamstring on the team's first possession, and Patrick Surtain injured his shoulder. RB Larry Johnson was limited by the Texans defense to just 43&#160;yards on 10 carries.

How many points were scored by defensive players?
Answer: 7
Although nominally part of the Ottoman Empire, Yemen and the sahil  came progressively under the control of Muhammad Ali, ruler of Egypt, between 1821 and 1841. After the Egyptians withdrew from the Yemeni seaboard in 1841, Haj Ali Shermerki, a successful and ambitious Somali merchant, purchased from them executive rights over Zeila. Shermerki's governorship had an instant effect on the city, as he manoeuvred to monopolize as much of the regional trade as possible, with his sights set as far as Harar and the Ogaden. Shermerki was later succeeded as Governor of Zeila by Abu Bakr Pasha, a local Afar statesman. In 1874-75, the Egyptians obtained a firman from the Ottomans by which they secured claims over the city. At the same time, the Egyptians received British recognition of their nominal jurisdiction as far east as Cape Guardafui. In actuality, however, Egypt had little authority over the interior and their period of rule on the coast was brief, lasting only a few years . The British Somaliland protectorate was subsequently established in the late 1880s, after the ruling Somali authorities signed a series of protection treaties granting the British access to their territories on the northwestern coast. Among the Somali signatories were the Gadabuursi , Habar Awal , and Warsangali. When the Egyptian garrison in Harar was eventually evacuated in 1885, Zeila became caught up in the competition between the Tadjoura-based French and the British for control of the strategic Gulf of Aden littoral. By the end of 1885, the two powers were on the brink of armed confrontation, but opted instead to turn negotiations. They later signed a convention on 1 February 1888 defining the border between French Somaliland and British Somaliland.

How many years did Yemen progressively come under the control of Muhammad Ali?
A:
20