Your task is to predict the verdict of a claim based on the provided question-answer pair evidence. The possible labels are: 'Supported', 'Refuted', 'Not Enough Evidence', 'Conflicting Evidence/Cherrypicking'. Justify your answer using the provided evidence and select the correct label.

Claim: Masks violate the US Department of Labor Occupational Safety and Health Administration’s 19.5% minimum oxygen level respiratory protection standard.

Q1: Do masks violate the US Department of Labor Occupational Safety and Health Administration?
A1: No. Medical masks, including surgical masks, are routinely worn by healthcare workers throughout the day as part of their personal protective equipment (PPE) ensembles and do not compromise their oxygen levels or cause carbon dioxide buildup.
user
justification: The evidence states that masks are work routinely by healthcare workers, suggesting they do not affect respiratory oxygen. 

verdict: 'Refuted'
assistant