Assertion: diver's tank | /r/HasAspect | the mix percentage
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Source sentences:
text: In recreational diving terms, enriched air nitrox (EAN) refers to any nitrogen/oxygen gas mixture with an oxygen concentration higher than the 21 percent found in normal air--32 percent oxygen is the most common--and tanks filled with EAN are often clearly marked with a nitrox tank band and have the mix percentage written somewhere near the tank valve.