math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Joyce had some Pen. Rich took 29 from him. Now Joyce has 31 Pen. 
sentence 2:  Joyce had 60 pens earlier.
<equate> (31 + 29, 60)
Joyce had some Pen. Rich took 29 from him. Now Joyce has 31 Pen. 
 Joyce had 60 pens earlier.