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