Instructions: 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.
Input: Question: How many years were there between the opening of Lawrence Livermore National Laboratory and the creation of metallic hydrogen by a group of scientists at the lab? Passage 1:The free settlement of what later became the colony of Queensland commenced on the Darling Downs in 1840. In 1842, the same year that Moreton Bay was opened to free settlement, Andrew Petrie was commissioned to explore the Wide Bay district. With a group of men that included Henry Stuart Russell, the explorer, pastoralist and historian, Petrie travelled by boat to explore the Mary River (then unnamed) as a possible source of Bunya trees. The explorers travelled about upstream, and it was concluded that the area would prove suitable for sheep rearing as the river would allow wool to be transported by boat. One of the men, Captain Joliffe, was an employee of the pastoralist and businessman John Eales, who later took up a large run at Tiaro and sent Joliffe there with 16,000 sheep. Although this venture failed, due to a combination of disease, attacks by the traditional owners, and financial problems, other pastoralists soon took up runs in the area. By 1847 more than 20 license applications for runs had been lodged in the region. In July 1847 the government surveyor James Charles Burnett gave encouraging reports of the suitability of what was then known as the Wide Bay River as a location for a port to service the area. The river was then named Mary after Lady Mary Lennox, the wife of Governor Fitzroy.
 Passage 2:On 15 May 1942, five months after the United States entered World War II, the 85th Infantry Division was ordered into active military service at Camp Shelby, Mississippi, under the command of Major General Wade H. Haislip. Divisions in the U.S. Army at that time were "triangularized" with three combat regiments instead of the four regiment structure "square division" used during World War I. The 340th Infantry Regiment was redesignated as the 410th Quartermaster Battalion and left the division. Basic infantry training was begun in June 1942 at Camp Shelby, Mississippi. In April 1943, it participated in large-scale army training in the Louisiana Maneuvers near Leesville, Louisiana. In August, the division was moved to Camp Coxcomb, California for desert warfare training. In October, the division was transferred to Fort Dix, New Jersey, for final preparations before shipment overseas. Major General John B. Coulter was transferred as commander and retained this position throughout the war. The Assistant Division Commander (ADC) throughout the war was Brigadier General Lee S. Gerow.
 Passage 3:In March 1996, a group of scientists at Lawrence Livermore National Laboratory reported that they had serendipitously produced the first identifiably metallic hydrogen for about a microsecond at temperatures of thousands of kelvins, pressures of over , and densities of approximately . The team did not expect to produce metallic hydrogen, as it was not using solid hydrogen, thought to be necessary, and was working at temperatures above those specified by metallization theory. Previous studies in which solid hydrogen was compressed inside diamond anvils to pressures of up to , did not confirm detectable metallization. The team had sought simply to measure the less extreme electrical conductivity changes they expected. The researchers used a 1960s-era light-gas gun, originally employed in guided missile studies, to shoot an impactor plate into a sealed container containing a half-millimeter thick sample of liquid hydrogen. The liquid hydrogen was in contact with wires leading to a device measuring electrical resistance. The scientists found that, as pressure rose to , the electronic energy band gap, a measure of electrical resistance, fell to almost zero. The band-gap of hydrogen in its uncompressed state is about , making it an insulator but, as the pressure increases significantly, the band-gap gradually fell to . Because the thermal energy of the fluid (the temperature became about due to compression of the sample) was above , the hydrogen might be considered metallic.

Output:
3