math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Charles had 255 kiwi. Nellie grabbed some kiwi. Now Charles has 84  kiwi. 
sentence 2:  Nellie grabbed 166 kiwi.
<equate> (255 - 84, 166)
Charles had 255 kiwi. Nellie grabbed some kiwi. Now Charles has 84  kiwi. 
 Nellie grabbed 166 kiwi.