Task: Coherence Classification
Input (English): Sentence 1: Irene needed to mail a package to her family. 
 Sentence 3: The employees there informed her that she needed to buy stamps 
 Sentence 4:  She was annoyed at first, but paid for the stamps 
 Sentence 5:  They were cheaper than she expected, so she had no worries 
 Given Sentence 2: She arrived at the post office.
Output (English): Yes