Question: Which company produced the science fiction hit that the American screenwriter born on September 30, 1946 was involved with? 
Sentence (from "10th World Science Fiction Convention"): The phrases "Tenth Anniversary World Science Fiction Convention" (TAWSFiC) and "Tenth Anniversary Science Fiction Convention" (TASFiC, likely a simple linotype error, as "World" is missing) were each used in some of this Worldcon's pre-convention materials; the phrase's acronyms "TAWSFiC" and "TASFiC" were never officially used in print or otherwise by the Chicago committee at that time.
Relevant evidence: No