Complex sentence: The stunt received national press attention and many listeners believed the story, leading Menino to file a complaint with the Federal Communications Commission (FCC) as broadcast regulations prohibit of knowingly false information if it causes public harm.
Split into simpler sentences: The stunt received national press attention, and many listeners believed the story. Menino responded to the stunt with a complaint to Federal Communications Commission (FCC) as their broadcast regulations prohibit of knowingly false information if it causes public harm.