Conversation so far:
Can you tell me about history of massive attack?
DJs Daddy G and Andrew Vowles and graffiti artist-turned-rapper Robert Del Naja met as members of partying collective The Wild Bunch.

Question: Did they then decide to form Massive Attack?
Self-contained rewrite: Did Daddy G, Andrew Vowles, and Robert Del Naja decide to form Massive Attack when they met?