Complex sentence: Filming for "The Terminator" was set to begin in early 1983 in Toronto, but was halted when producer Dino De Laurentiis applied an option in Schwarzenegger's contract that would make him unavailable for nine months while he was filming "Conan the Destroyer".
Split into simpler sentences: Filming for "The Terminator" was set to begin in early 1983 in Toronto. Production was halted when producer Dino De Laurentiis applied an option in Schwarzenegger's contract that would make him unavailable for nine months while he was filming "Conan the Destroyer".