Definition: 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 square miles in size is the National park that Namakgale is next to? Passage 1:Allen was born into a prominent Philadelphia family. His father, William Allen, was a successful merchant and lawyer, and would later be the Chief Justice of the Supreme Court of Pennsylvania. Andrew graduated from the City College of Philadelphia (later the University of Pennsylvania) in 1759, read law under Benjamin Chew, and then went to London to complete a legal education at the Inner Temple. He returned to Philadelphia in 1765, was admitted to the bar, and began to practice law. That same year Allen was elected to the Pennsylvania Assembly. In 1766, he was appointed the colony's Attorney General. He married Sarah ("Sally") Coxe, sister of Tench Coxe, in April 1768. In 1770 his brother-in-law, Governor John Penn, gave him a seat on the Governor's Council.
 Passage 2:Starting fluid is a volatile, flammable liquid which is used to aid the starting of internal combustion engines, especially during cold weather or in engines that are difficult to start using conventional starting procedures. It is typically available in an aerosol spray can, and may sometimes be used for starting direct injected diesel engines or lean burn spark engines running on alcohol fuel. Some modern starting fluid products contain mostly volatile hydrocarbons such as heptane, (the main component of natural gasoline) with a small portion of diethyl ether, and carbon dioxide (as a propellant). Some formulations contain butane or propane as both propellant and starting fuel. Historically, Diethyl ether, with a small amount of oil, a trace amount of a stabilizer and a hydrocarbon propellant has been used to help start internal combustion engines because of its low autoignition temperature.
 Passage 3:Namakgale is a large township lying 12 km outside Phalaborwa in Mopani District in the Limpopo province of South Africa. Its nearest neighbouring townships are Lulekani, Makhushane, Maseke and Mashishimale on the R71 road to Gravelotte. It is next to the Kruger National Park on the north eastern part of the Limpopo province previously Northern Transvaal. The township enjoys the annual Marula festival during the months of February and March, when the ripe Marula fruit harvest is at its peak, and the Marula traditional beer is brewed. This is home to the Amarula liqueur is harvested, and the pulp is shipped to Cape Town for further processing. The citizens of Namakgale will enjoy the Mopani worms first harvest during March and April, and the second harvest in December. the Mopani tree and the Morula tree are very important to the residents of the Namakgale as they bring important community subsistence farming. 

Output:
3