Question: What sport do both the 2017 EFL League One play-off Final and the 2017–18 EFL Championship have in common?
Related documents: [0]  [DOC] The 2017–18 EFL Championship (referred to as the Sky Bet Championship for sponsorship reasons) is the second season of the EFL Championship under its current name, and the twenty-sixth season under its current league structure. [END] 
[1]  [DOC] The 2017 EFL League One play-off Final was a football match contested between Bradford City and Millwall. The match was played at Wembley Stadium on 20 May 2017 and was won 1–0 by Millwall, the only goal scored by Steve Morison in the 85th minute. Millwall were promoted to the Championship for the 2017–18 season. The match saw the first ever pitch invasion at the new Wembley Stadium. [END] 
Answer: 
football
football