math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Robert had 191 Doll. Polly took 191 from him. Now 
sentence 2:  Robert has no Dollars.
<equate> (191 - 191, Dollars.)
Robert had 191 Doll. Polly took 191 from him. Now 
 Robert has no Dollars.