math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: David had 142 mango. James grabbed some mango. Now David has 18  mango. 
sentence 2:  James grabbed 119 mangoes.
<equate> (142 - 18, 119)
David had 142 mango. James grabbed some mango. Now David has 18  mango. 
 James grabbed 119 mangoes.