Question: Who were the parents of the singer, who covered the song "So Sad About Us" and has a half-brother named David Cassidy?
Sentence (from "So Sad About Us"): Originally written for The Merseys, "So Sad About Us" has likely been covered more frequently than any other song on the album; according to the All Music Guide, it is "one of the Who's most covered songs".
Relevant evidence: No