math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: 13 ducks are swimming in a lake. 20 more ducks come to join them. 
sentence 2:  There are 33 ducks swimming in the lake.
<equate> ((13.0+20.0), 33)
13 ducks are swimming in a lake. 20 more ducks come to join them. 
 There are 33 ducks swimming in the lake.