Table schema:
CREATE TABLE performance (bandmate VARCHAR, songid VARCHAR); CREATE TABLE songs (songid VARCHAR, Title VARCHAR); CREATE TABLE band (id VARCHAR)

Question: Hom many musicians performed in the song "Flash"?
SQL: SELECT COUNT(*) FROM performance AS T1 JOIN band AS T2 ON T1.bandmate = T2.id JOIN songs AS T3 ON T3.songid = T1.songid WHERE T3.Title = "Flash"