math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: William had some banana. Jewell gave him 8 more. Now William has 27 banana. 
sentence 2:  William had 19 bananas in the beginning.
<equate> (27 - 8, 19)
William had some banana. Jewell gave him 8 more. Now William has 27 banana. 
 William had 19 bananas in the beginning.