math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Malcolm had some plum. Antoinette gave him 8 more. Now Malcolm has 11 plum. 
sentence 2:  Malcolm had 3 plums at first.
<equate> (11 - 8, 3)
Malcolm had some plum. Antoinette gave him 8 more. Now Malcolm has 11 plum. 
 Malcolm had 3 plums at first.