math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: William had 176 blackberry. Sandra took 27 from him. Now 
sentence 2:  William has 146 blackberries.
<equate> (176 - 27, 146)
William had 176 blackberry. Sandra took 27 from him. Now 
 William has 146 blackberries.