Question: Graham Bonnet and John Corabi, have which mutual occupation?
Related documents: [0]  [DOC] John Corabi (born April 26, 1959) is a hard rock singer and guitarist who has worked with such bands as Angora, The Scream, Mötley Crüe, Union and ESP (both with former Kiss lead guitarist Bruce Kulick), Ratt (as a guitarist), Twenty 4 Seven (with his then Ratt bandmate Bobby Blotzer), Zen Lunatic, Brides of Destruction, and Angel City Outlaws (with his then Ratt bandmates Robbie Crane and Bobby Blotzer, and former Ratt guitarist Keri Kelli, who he replaced in Ratt). He is the current lead singer for The Dead Daisies. [END] 
[1]  [DOC] Graham Bonnet (born 23 December 1947) is an English rock singer and songwriter. He has recorded and performed as a solo artist and as a member of several hard rock and heavy metal bands including Rainbow, the Michael Schenker Group, Alcatrazz, and Impellitteri. Bonnet is known for his James Dean-inspired style and extremely powerful singing voice and wide vocal range. His singing has been noted as 'very loud' by both his contemporaries and himself, and he claims to be a self-taught singer with 'no discipline for lessons'. [END] 
Answer: 
rock singer
rock singer