Complex sentence: In contrast, film theoreticians in England began integrating critical theory based perspectives drawn from psychoanalysis, semiotics, and Marxism, and eventually these ideas gained hold within the American scholarly community in the later 1970s and 1980s.
Split into simpler sentences: In contrast, film theoreticians in England began integrating perspectives based on critical theory and drawing inspiration from psychoanalysis, semiotics, and Marxism. Eventually these ideas gained hold within the American scholarly community in the later 1970s and 1980s.