Complex sentence: On the morning after a going-away party the girls threw for Eleanor, they find a man in their bathtub who had passed out and, after waking up, claimed that he was a friend of one of the party crashers.
Split into simpler sentences: On the morning after a going-away party the girls threw for Eleanor, they found a man in their bathtub who had passed out. After waking up, the man claimed that he was a friend of one of the party crashers.