math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Julietta had 152 Pen. Ann get hold of some Pen. Now Julietta has 91  Pen. 
sentence 2:  Ann got 61 Pens. 
<equate> (152 - 91, 61)
Julietta had 152 Pen. Ann get hold of some Pen. Now Julietta has 91  Pen. 
 Ann got 61 Pens. 