Complex sentence: The final attraction is "E.T. Adventure" which opened in 1990, the ride is a dark ride based on the 1982 hit film "E.T. the Extra-Terrestrial".
Split into simpler sentences: The final attraction is "E.T. Adventure". Opening in 1990, the ride is a dark ride based on the 1982 hit film "E.T. the Extra-Terrestrial".