Complex sentence: The screenplay by Nora Ephron and Alice Arlen was inspired by the life of Karen Silkwood, a nuclear power whistleblower and a labor union activist who died in a suspicious car accident while investigating alleged wrongdoing at the Kerr-McGee plutonium plant where she worked.
Split into simpler sentences: The screenplay by Nora Ephron and Alice Arlen was inspired by the life of Karen Silkwood. Silkwood was a nuclear power whistleblower and a labor union activist who died in a suspicious car accident while investigating alleged wrongdoing at the Kerr-McGee plutonium plant where she worked.