math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Joseph had some Car. Margret gave him 8 more. Now Joseph has 33 Car. 
sentence 2:  Joseph had 21 cars earlier.
<equate> (33 - 8, 21)
Joseph had some Car. Margret gave him 8 more. Now Joseph has 33 Car. 
 Joseph had 21 cars earlier.