math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Nancy had some lychee. Margaret gave him 4 more. Now Nancy has 16 lychee. 
sentence 2:  Nancy had 10 lychee in the beginning.
<equate> (16 - 4, 10)
Nancy had some lychee. Margaret gave him 4 more. Now Nancy has 16 lychee. 
 Nancy had 10 lychee in the beginning.