Part 1. Definition
In this task, you're given four sentences of a story written in natural language, and one last sentence (Sentence5). Your job is to classify whether the last sentence completes the rest of the story coherently or not by providing 'Yes' or 'No'.
Part 2. Example
Sentence1: Rick grew up in a troubled household. Sentence2: He never found good support in family, and turned to gangs. Sentence3: It wasn't long before Rick got shot in a robbery. Sentence4: The incident caused him to turn a new leaf. 
 Sentence5: He is happy now.
Answer: Yes
Explanation: As mentioned in fourth sentence, the incident turned a new leaf to Rick's life; so, he must be happy now.
Part 3. Exercise
Sentence1: Many years ago, the United States was not a country. Sentence2: Instead, the people who lived there were part of England. Sentence3: They decided they wanted to be their own country. Sentence4: There was a long war, but ultimately they prevailed. 
 Sentence5: The war was called the American Revolution.
Answer:
Yes