Conversation so far:
How did Buffalo Springstein form?
Neil Young and Stephen Stills met in 1965, at the Fourth Dimension in Thunder Bay, Ontario.
How did Richard Furay get involved?
Stills invited fellow Au Go Go Singers alumnus Richie Furay.

Question: What was Richie invited to?
Self-contained rewrite: What was Richie Furay invited to by Stephen Stills?