math-nli: Output if sentence 2 Entails statement 1 or Contradicts statement 1 - 
sentence 1: A dust storm sweeps across the prairie . It covers 64535 acres of the prairie in dust , but leaves 522 acres untouched . 
sentence 2:  The prairie covers 64018 acres.
<equate> (64535.0 - 522.0, 64018)
A dust storm sweeps across the prairie . It covers 64535 acres of the prairie in dust , but leaves 522 acres untouched . 
 The prairie covers 64018 acres.