math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Rose had some lemon. William gave him 2 more. Now Rose has 20 lemon. 
sentence 2:  Rose had 21 lemons in the beginning.
<equate> (20 - 2, 21)
Rose had some lemon. William gave him 2 more. Now Rose has 20 lemon. 
 Rose had 21 lemons in the beginning.