math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Stephani had 20 Watch. Gregory supplyed him some more. Now Stephani has 187 Watch. 
sentence 2:  Gregory supplied Stephani with 167 Watches.
<equate> (187 - 20, 167)
Stephani had 20 Watch. Gregory supplyed him some more. Now Stephani has 187 Watch. 
 Gregory supplied Stephani with 167 Watches.