Task: Coherence Classification
Input (English): Sentence 1: Sarah loved to drink coffee. 
 Sentence 3: Her teeth were yellow from the coffee 
 Sentence 4:  She stained her teeth with a product she bought 
 Sentence 5:  Her teeth are now white 
 Option 1: She drank coffee everyday. 
 Option 2: She avoided drinking coffee to keep her teeth white.
Output (English): Option 1