You will be given a definition of a task first, then some input of the task.
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.

Sentence 1: The new apartment smelled terrible. Sentence 2: They moved in only because they were desperate. Sentence 3: They couldn't find the source of the smell. Sentence 4: They even called in an exterminator. Sentence 5: They found a dead rat under the kitchen sink that was causing it.
Output:
Apartment