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.

Question: How long had Darrell Royal been working as a head coach the year he learned about the wishbone offense? Passage 1:In 1968, Texas head coach Darrell Royal and his offensive coordinator Emory Bellard introduced what would become known as the wishbone offense. The wishbone was derived from the Split-T offense run at Oklahoma under Bud Wilkinson. In the formation, the quarterback lines up with a fullback and two tailbacks behind him, and on any play may keep the ball, hand off to the fullback, or pitch to a tailback. From the time Bryant arrived at Alabama through the 1970 season, the Crimson Tide ran a pro-style offense. By 1969, Bryant began to recruit larger linemen and tailbacks, and after a pair of six win seasons in 1969 and 1970, Bryant saw the success of the wishbone for the Longhorns and decided to implement the offense for the 1971 season. In spring 1971, Alabama assistants Mal Moore and Jimmy Sharpe traveled to Austin where they saw first hand how the wishbone operated during Texas' final week of spring practice.
 Passage 2:A second battalion was raised in 1804 to increase the strength of the regiment. The 1st battalion embarked for Copenhagen in July 1807 and saw action at the Battle of Copenhagen in August 1807 during the Gunboat War before returning home in November 1807. It then embarked for Portugal in May 1808 for service under General Sir Arthur Wellesley in the Peninsular War and saw action at the Battle of Roliça in August 1808 and the Battle of Vimeiro later that month. In January 1809 the battalion took part in the Battle of Corunna, carrying out successive bayonet charges to keep the French at bay to which General Sir John Moore shouted "Well done, 50th! Well done, my Majors!". The battalion was subsequently evacuated from the Peninsula. Both battalions then embarked from the Downs in July 1809 and saw action in the disastrous Walcheren Campaign. It was the last regiment to leave Holland in December 1809.
 Passage 3:In Week 3 against the Pittsburgh Steelers, Forte had a 55-yard run, and the following week against the Detroit Lions, had a 53-yard run, making him the first Bears running back to record runs of 50+ yards in back-to-back games since Raymont Harris in 1997. Two weeks later, against the New Orleans Saints, Forte passed Rick Casares for third in the all-time leading rusher list with 5,702 career yards, behind Walter Payton and Neal Anderson. In Week 7 against the Washington Redskins, Forte scored three rushing touchdowns. Against the Detroit Lions in Week 10, Forte recorded 49 yards from scrimmage to bring his season total to 1,023, and became the first player in Bears history and 18th NFL player to record 1,000 yards from scrimmage in each of his first six seasons. On November 24, 2013, Forte passed Neal Anderson for the second most career rushing yards in Bears franchise history. On December 27, Forte was named to the 2014 Pro Bowl. In the Week 17 loss to Green Bay, Forte recorded his 20th 100-yard rushing game, tying Gale Sayers for the second-most in Bears history. He also had three touchdowns, becoming the third Bear with two three-touchdown games in a season. Forte ended the 2013 season with a career-high nine rushing touchdowns along with 1,933 total yards from scrimmage, fifth-most in team history and the second-most behind Payton. Forte also had 1,339 rushing yards during the season, the ninth-most in franchise history. Forte's 1,339 rushing yards ranked second in the NFL in 2013, while his all-purpose yards from 1,933 yards ranked fourth. Following the regular season's conclusion, Forte was one of three finalists for the FedEx Ground Player of the Year Award, but finished runner-up to LeSean McCoy and Jamaal Charles.
1