math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Naomi had 77 Watch. Iris took 42 from him. Now 
sentence 2:  Naomi has 39 watches.
<equate> (77 - 42, 39)
Naomi had 77 Watch. Iris took 42 from him. Now 
 Naomi has 39 watches.