math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Bob had some Pen. Linda took 30 from him. Now Bob has 87 Pen. 
sentence 2:  Bob had 121 pens in the first place.
<equate> (87 + 30, 121)
Bob had some Pen. Linda took 30 from him. Now Bob has 87 Pen. 
 Bob had 121 pens in the first place.