math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Kenneth has 3 marbles. He buys 6 more. Later, Kenneth buys 15 apples at the store. 
sentence 2:  Kenneth has 9 marbles in all.
<equate> ((3.0+6.0), 9)
Kenneth has 3 marbles. He buys 6 more. Later, Kenneth buys 15 apples at the store. 
 Kenneth has 9 marbles in all.