Question: Cyril Havermans is a Dutch musician, best known for being in the progressive rock band, Focus,  a Dutch rock band formed in Amsterdam in which year, by keyboardist, vocalist, and flutist Thijs van Leer?
Sentence (from "Cyril Havermans"): Cyril Havermans is a Dutch musician, best known for being in the progressive rock band, Focus.
Relevant evidence: Yes