math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Angela had 219 blackcurrant. Todd grabbed some blackcurrant. Now Angela has 99  blackcurrant. 
sentence 2:  Todd grabbed 117 blackcurrants.
<equate> (219 - 99, 117)
Angela had 219 blackcurrant. Todd grabbed some blackcurrant. Now Angela has 99  blackcurrant. 
 Todd grabbed 117 blackcurrants.