math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Helen had 88 mango. Miguel took 31 from him. Now 
sentence 2:  Helen has 57 mangoes.
<equate> (88 - 31, 57)
Helen had 88 mango. Miguel took 31 from him. Now 
 Helen has 57 mangoes.