math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Melanie had 115 Flower. Charles took 15 from him. Now 
sentence 2:  Melanie has 99 flowers.
<equate> (115 - 15, 99)
Melanie had 115 Flower. Charles took 15 from him. Now 
 Melanie has 99 flowers.