math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Douglas had some mango. Frank took 67 from him. Now Douglas has 76 mango. 
sentence 2:  Douglas had 144 mango to begin with.
<equate> (76 + 67, 144)
Douglas had some mango. Frank took 67 from him. Now Douglas has 76 mango. 
 Douglas had 144 mango to begin with.