Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Mary heard a noise. Sentence 2: Someone was in her house! Sentence 3: She yelled at them to leave before she called the police. Sentence 4: She heard them scamper out of the house. Sentence 5: Mary rushed to lock the door behind them.

The Intruder