Task: Wrong Candidate Generation
Input (English): Context: I spent a good part of the day with my dad today , moving stuff back to their place etc . I felt bad at some points because I was getting irritated and taking it out on him . My heart wrenched a bit when I went to touch his arm as I thanked him ( he actually spoke to an associate at Zellers not once but TWICE to find prices for me , definitely not a common occurrence from him ) . 
Question: Why may he have thanked his Dad ? 
Correct Answer: His Dad helped him a lot .
Output (English): Because it was n't a comon occurrence .