math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Booker had 54 toy. Kenneth took 15 from him. Now 
sentence 2:  Booker has 39 toys.
<equate> (54 - 15, 39)
Booker had 54 toy. Kenneth took 15 from him. Now 
 Booker has 39 toys.