math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Marvin had some kiwi(fruit). Corey gave him 2 more. Now Marvin has 13 kiwi(fruit). 
sentence 2:  Marvin had 11 kiwi(fruit) at first.
<equate> (13 - 2, 11)
Marvin had some kiwi(fruit). Corey gave him 2 more. Now Marvin has 13 kiwi(fruit). 
 Marvin had 11 kiwi(fruit) at first.