Detailed Instructions: 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'.
Q: Sentence1: I decided to add a new fountain pen to my collection. Sentence2: I'd seen online videos of a nice pen called a Pelikan M800. Sentence3: So I went to the pen shop at my local mall. Sentence4: The shop had just the model of pen I wanted. 
 Sentence5: I didn't buy the pen.
A:
No