Question: The 1977–78 season was Manchester United's 76th season in the Football League, and their third consecutive season in the top division of English football, it was their first season under the management of which English football manager and player? 
Sentence (from "Dave Sexton"): David James Sexton OBE (6 April 1930 – 25 November 2012) was an English football manager and player.
Relevant evidence: Yes