Complex sentence: The arc of the story involves Bickle's attempts to protect a 12-year-old child prostitute, played by Foster; toward the end of the film, Bickle attempts to assassinate a United States Senator who is running for president.
Split into simpler sentences: The arc of the story involves Bickle's attempts to protect a 12-year-old child prostitute, played by Foster. Towards the end of the film, Bickle attempts to assassinate a United States Senator who is running for president.