Complex sentence: Mollo was approached by Kevin Brownlow for assistance on his film "It Happened Here" that led Mollo into co-writing, co-directing and co-producing the project which premiered in 1964.
Split into simpler sentences: Mollo was approached by Kevin Brownlow for assistance on his film "It Happened Here". This led Mollo into co-writing, co-directing and co-producing the project which premièred in 1964.