Complex sentence: In 1991, Hasbro purchased Tonka Corporation for $486 million, which included the Parker Brothers unit, the maker of the Monopoly board game, and Kenner Products, the maker of Star Wars and The Real Ghostbusters action figures.
Split into simpler sentences: In 1991, Hasbro purchased Tonka Corporation for $486 million. The purchased included the Parker Brothers unit, the maker of the Monopoly board game, and Kenner Products, the maker of Star Wars and The Real Ghostbusters action figures.