math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Tamra had 157 Mango. Bertha grabbed some Mango. Now Tamra has 20  Mango. 
sentence 2:  Bertha grabbed 137 Mangoes.
<equate> (157 - 20, 137)
Tamra had 157 Mango. Bertha grabbed some Mango. Now Tamra has 20  Mango. 
 Bertha grabbed 137 Mangoes.