math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Adam had some blackcurrant. Nina gave him 9 more. Now Adam has 27 blackcurrant. 
sentence 2:  Adam had 17 blackcurrants.
<equate> (27 - 9, 17)
Adam had some blackcurrant. Nina gave him 9 more. Now Adam has 27 blackcurrant. 
 Adam had 17 blackcurrants.