Complex sentence: Ronnie runs into Walter at the track during Gettn'up's morning exercise, and in a conversation overheard by Rosie, Walter tells Ronnie that when his employer died, the man's heirs killed Delphi in order to collect on a large insurance policy.
Split into simpler sentences: Ronnie runs into Walter at the track during Gettn'up's morning exercise. In a conversation overheard by Rosie, Walter tells Ronnie that when his employer died, the man's heirs killed Delphi in order to collect on a large insurance policy.