Complex sentence: Sulkowicz alleges that the accused anally raped her during a sexual encounter that began as consensual, alleging that he hit her, then choked her and pinned her down, while she told him to stop.
Split into simpler sentences: Sulkowicz alleges that the accused anally raped her during a sexual encounter that began as consensual. She also alleges that he hit her, then choked her and pinned her down, while she told him to stop.