Which vocalist has sung with both Deep Purple and Black Sabbath?
which vocalist has sung with both deep purple and black sabbath
FreebaseQA-train-2803.P0 FreebaseQA-train-2803.P1
black sabbath deep purple
black sabbath deep purple
m.01czx m.0cfgd
music.musical_group.member..music.group_membership.member music.musical_group.member..music.group_membership.member
m.0dgfsk
ian gillan
m.0dgfsk
ian gillan