math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Robert had some mango. Kristin took 59 from him. Now Robert has 82 mango. 
sentence 2:  Robert had 138 mangoes at first.
<equate> (82 + 59, 138)
Robert had some mango. Kristin took 59 from him. Now Robert has 82 mango. 
 Robert had 138 mangoes at first.