Task: Text Matching
Input (English): Heliair will have less than 21 % oxygen and will be hypoxic ( less than 17 % oxygen ) for mixtures with more than 20 % helium .
Heliair will always have more than 21 % oxygen and will be hypoxic in mixtures with less than 20 % helium ( less than 17 % oxygen ) .
Output (English): Not paraphrase