Teacher:In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Teacher: Now, understand the problem? Solve this instance: Question: How long did the Siege of Boston last? Passage 1:The Battle of Lexington and Concord was the first conflict in the American Revolutionary War. On April 19, 1775, a force of British Army regulars marched from Boston to Concord to capture a cache of arms that was reportedly stored in the town. Forewarned by Samuel Prescott (who had received the news from Paul Revere), the colonists mustered in opposition. Following an early-morning skirmish at Lexington, where the first shots of the battle were fired, the British expedition under the command of Lt. Col. Francis Smith advanced to Concord. There, colonists from Concord and surrounding towns (notably a highly drilled company from Acton led by Isaac Davis) repulsed a British detachment at the Old North Bridge and forced the British troops to retreat. Subsequently, militia arriving from across the region harried the British troops on their return to Boston, culminating in the Siege of Boston and the outbreak of the war.
 Passage 2:While in the Antarctic outpost in the pilot episode "Rising", Dr. Rodney McKay forces Beckett to sit in an Ancient control chair. Beckett's Ancient gene causes him to accidentally activate a drone weapon zeroing on General O'Neill and Major Sheppard's helicopter, but he manages to stop it. After finding and arriving in the city of Atlantis, Beckett examines a severed Wraith arm that Major Sheppard brought back from the planet Athos. Beckett can provide the first information about Wraith physiology and becomes the chief medical officer in Atlantis. In "Hide and Seek", he creates a gene therapy that emulates the ATA gene in normal humans with a 48 percent success rate. In "Poisoning the Well", Beckett helps the Hoffans develop a drug that kills the Wraith who feed on humans, but the drug has the side effect of killing 50 percent of the human recipients as well. One of the casualties is Perna, a Hoffan woman he has grown attached to. Carson leaves in disgust when the Hoffans decide to disseminate the drug among their people at all costs. In "The Gift", he discovers that Teyla has Wraith DNA in her genetic makeup, which allows her to tap into the Wraith psychic network in this and future episodes. In the second season, Beckett takes up more offworld activities, including one mission where he removes a Wraith tracker from Ronon Dex's spine in "Runner".
 Passage 3:"Glamorous Sky" is Mika Nakashima's 16th single overall, her 1st under the name Nana starring Mika Nakashima, and the second most successful single in her career after "Stars". It is her first rock song and it was used as one of the image songs for the film Nana (as one of the bands Black Stones' song). Hyde of L'Arc-en-Ciel composed "Glamorous Sky", while Yazawa Ai wrote the lyrics. The second and third B-sides, "Blood" and "Isolation" were used as CM songs for Kate cosmetics. Mika Nakashima graces the cover of the single as Nana Osaki. The song is featured as a cover by a jrock band, Girugamesh, in the Konami music games, BEMANI for Drummania V3 and Guitarfreaks V3, as well as the iNiS rhythm game Moero! Nekketsu Rhythm Damashii Osu! Tatakae! Ouendan 2.

Student:
1