math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Walter had 158 Pen. Shirley clasped some Pen. Now Walter has 83  Pen. 
sentence 2:  Shirley clasped 74 pens.
<equate> (158 - 83, 74)
Walter had 158 Pen. Shirley clasped some Pen. Now Walter has 83  Pen. 
 Shirley clasped 74 pens.