Task: Coherence Classification
Input (English): Sentence 1: David's mother's birthday was coming up. 
 Sentence 3: When he remembered he ran out in a panic to buy a gift 
 Sentence 4:  He managed to buy a book just before the bookstore closed 
 Sentence 5:  His mother loved the book when he gave it to her the next day 
 Option 1: Glenn had forgotten about this until the week before it. 
 Option 2: Glenn had forgotten about this until the day before it.
Output (English): Option 2