Complex sentence: Grumman Aircraft, with operations in Bethpage and Calverton, produced the F-14 U.S. Navy fighter during the 1970s and 1980s, and was also the chief contractor on the Apollo Lunar Module that landed men on the moon.
Split into simpler sentences: Grumman Aircraft, with operations in Bethpage and Calverton, produced the F-14 U.S. Navy fighter during the 1970s and 1980s. It was also the chief contractor on the Apollo Lunar Module that landed men on the moon.