math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: A restaurant made 9 hamburgers to serve during lunch . Only 3 were actually served . 
sentence 2:  2 hamburgers were over from lunch.
<equate> (9 - 3, 2)
A restaurant made 9 hamburgers to serve during lunch . Only 3 were actually served . 
 2 hamburgers were over from lunch.