math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Janet had some Mango. Shawn gave him 9 more. Now Janet has 26 Mango. 
sentence 2:  Janet had 18 Mango in the first place.
<equate> (26 - 9, 18)
Janet had some Mango. Shawn gave him 9 more. Now Janet has 26 Mango. 
 Janet had 18 Mango in the first place.