math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Maria had some Mango. Madeleine gave him 4 more. Now Maria has 18 Mango. 
sentence 2:  Maria had 9 Mango initially.
<equate> (18 - 4, 9)
Maria had some Mango. Madeleine gave him 4 more. Now Maria has 18 Mango. 
 Maria had 9 Mango initially.