Complex sentence: Pat Ast (October 21,1941-October 3,2001) was an American actress in Andy Warhol films, and a Halston model and muse in the 1970s.
Split into simpler sentences: Pat Ast (October 21,1941-October 3,2001) was an American actress and model. She was best known for starring in Andy Warhol films and being a Halston model and muse in the 1970s.