Q: 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: When did Sutherland retire from coaching? Passage 1:A halfback, Marhefka spent four seasons, 1920 through 1924, on Lafayette's football team under coach Jock Sutherland. In 1921 the squad went undefeated, but the college's president refused to allow them to compete in the Rose Bowl. After graduation, he was picked up by the Pottsville Maroons and played with them during their sole season in the Anthracite League, in which they were the champions. He remained with the team when they joined the National Football League the following year and was with them when, despite having the best record in the league, they were denied the 1925 NFL championship after being controversially suspended. He had a final season in professional football with the 1926 Philadelphia Quakers of the first American Football League, in which they were the champions. Marhekfa appeared in two games for the team during the season.
 Passage 2:Ferns made his debut for Felda United F.C. in the Malaysia Super League with a 2-1 win against Pahang FA in July 2017. Under the guidance of head coach B. Sathianathan, Ferns made a successful contribution, helping the team reach 3rd place in the Malaysia Super League and semi-final of the Malaysia Cup. Unfortunately, in the off-season of 2017 the club was notified it was being relegated to the Malaysia Premier League for the 2018 season after failing the Football Association of Malaysia club licence financial audit. Despite this setback, Ferns and the majority of the squad stayed at the club to help Felda United F.C win the title and secure promotion back to the Malaysia Super League for 2019. 
 Passage 3:At the beginning of the ninth century, England was almost wholly under the control of the Anglo-Saxons. The Midland kingdom of Mercia dominated southern England, but their supremacy came to an end in 825 when they were decisively defeated by Ecgberht at the Battle of Ellendun. The two kingdoms became allies, which was important in the resistance to Viking attacks. In the same year Ecgberht sent his son Æthelwulf to conquer the Mercian sub-kingdom of Kent (the area of the modern county plus Essex, Surrey and Sussex) and appointed him sub-king. In 835 the Isle of Sheppey was ravaged by Vikings and in the following year they defeated Ecgberht at Carhampton in Somerset, but in 838 he was victorious over an alliance of Cornishmen and Vikings at the Battle of Hingston Down, reducing Cornwall to the status of a client kingdom. He died in 839 and was succeeded by Æthelwulf, who appointed his eldest son Æthelstan as sub-king of Kent. Æthelwulf and Ecgberht may not have intended a permanent union between Wessex and Kent as they both appointed sons as sub-kings and charters in Wessex were attested (witnessed) by West Saxon magnates, while Kentish charters were witnessed by the Kentish elite; both kings kept overall control and the sub-kings were not allowed to issue their own coinage.

A:
1