math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: Fred has 5 yellow balloons , Sam has 6 yellow balloons , and Mary has 7 yellow balloons . The balloons cost 5 dollars . 
sentence 2:  They have 18 yellow balloons in total.
<equate> (5 + 6 + 7, 18)
Fred has 5 yellow balloons , Sam has 6 yellow balloons , and Mary has 7 yellow balloons . The balloons cost 5 dollars . 
 They have 18 yellow balloons in total.