math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Brigitte had 21 mango. William giveed him some more. Now Brigitte has 187 mango. 
sentence 2:  William gave Brigitte 171 mangoes.
<equate> (187 - 21, 171)
Brigitte had 21 mango. William giveed him some more. Now Brigitte has 187 mango. 
 William gave Brigitte 171 mangoes.