Simplify the following text for a Grade 7 native English-speaking person.
Original: Swansea City Association Football Club is a Welsh professional football club based in Swansea , Wales , currently playing in the Football League Championship . Formed in 1912 , they joined the Football League in 1920 , and have been members ever since .
Simplified: Swansea City AFC are a Welsh soccer team who have played in the English Football League since 1920 .