Complex sentence: The 1990 movie Total Recall features a red pill, which was offered to Arnold Schwarzenegger's character Douglas Quaid, which he is told "is a symbol of (his) desire to return to reality".
Split into simpler sentences: The 1990 movie Total Recall features a red pill, which is offered to Arnold Schwarzenegger's character Douglas Quaid. He is told "it is a symbol of your desire to return to reality".