math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Helen had some raspberry. Joetta took 87 from him. Now Helen has 91 raspberry. 
sentence 2:  Helen had 178 raspberries at first.
<equate> (91 + 87, 178)
Helen had some raspberry. Joetta took 87 from him. Now Helen has 91 raspberry. 
 Helen had 178 raspberries at first.