math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Francis had 195 papaya. Sherry took 28 from him. Now 
sentence 2:  Francis has 167 papaya.
<equate> (195 - 28, 167)
Francis had 195 papaya. Sherry took 28 from him. Now 
 Francis has 167 papaya.