Detailed Instructions: In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Problem:Passage: Roberts played youth football for Cessnock before joining APIA Leichhardt in the New South Wales State League. He played at APIA in 1964 and 1965. In 1966, he travelled to England to trial with Football League Division One team Chelsea. After the unsuccessful trial he was signed by Blackburn Rovers in April 1966. Roberts played three times for Blackburn in the 196566 season, returning then to APIA where he played the remainder of the 1966 season. He was sent out on loan in August 1967 to Chesterfield in the Football League Fourth Division, where he played 46 matches during the 19671968 season. In 1968, he was signed by Bradford City; there he made 44 appearances between 1968 and 1970, and played in the team that won promotion from the Fourth Division to the Third Division in 1969. In early 1971 he transferred to Southend United, and at the end of the 19711972 season moved to Northampton Town, staying there for one season and playing 13 times.
Link Information: After the unsuccessful trial he was signed by Blackburn Rovers in April 1966. Answer: Blackburn Rovers
Solution:
Which of the teams the John Roberts played for have won the most championships?