Conversation so far:
When did Future Islands' Herring start making hip-hop music?
Future Islands' Samuel Herring had started making hip-hop music when he was 13 or 14.
When did Future Islands' drummer leave?
Future Islands' drummer Erick Murillo left in November 2007, after which the band relocated.
What type of music did Future Islands play?
Future Islands is an American synthpop band.
What year did Future Islands relocate to Baltimore?
Future Islands relocated to Baltimore in 2007

Question: How many member were in the band?
Self-contained rewrite: How many member were in the band, Future Islands?