Everton's biggest rivalry is with neighbours Liverpool, against whom they contest the Merseyside derby. The Merseyside derby is usually a sellout fixture, and has been known as the "friendly derby" because both sets of fans can often be seen side by side red and blue inside the stadium both at Anfield and Goodison Park. Recently on the field, matches tend to be extremely stormy affairs; the derby has had more red cards than any other fixture in Premiership history. The rivalry stems from an internal dispute between Everton officials and the owners of Anfield, which was then Everton's home ground, resulting in Everton moving to Goodison Park, and the subsequent formation of Liverpool F.C., in 1892.
What derby does Everton FC contest against Liverpool? (If the question is unanswerable, say "unanswerable")
Merseyside