You will be given a definition of a task first, then some input of the task.
In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.

Title: Sibling Rivalry. Sentence 1: Dan and his brother Don have always been competitive. Sentence 2: Recently there was a marathon occurring in Boston. Sentence 3: Dan and Don decided to see who could get the better time. Sentence 4: However, during the marathon, Don fell and could not finish the race.
Output:
Dan decided to help his brother instead of finishing the race.