math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Joan paid $8.77 on a cat toy, and a cage cost her $10.97 with a $20 bill. 
sentence 2:  Joan received $1.26 in change.
<equate> (20, $1.26)
Joan paid $8.77 on a cat toy, and a cage cost her $10.97 with a $20 bill. 
 Joan received $1.26 in change.