math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Michael had 81 Biscuit. Jennifer took 63 from him. Now 
sentence 2:  Michael has 18 biscuits.
<equate> (81 - 63, 18)
Michael had 81 Biscuit. Jennifer took 63 from him. Now 
 Michael has 18 biscuits.