| http://www.w3.org/ns/prov#value | - Survey data collected by interviewers ??? Taken any vitamin, mineral or other dietary supplements in past month? ??? Supplement name entered and selected ??? Supplement strength, if single ingredient ??? Was the container was seen? ??? Supplement manufacturer entered and selected ??? How long supplement has been taken? ??? How often supplement was taken in past month? ??? How much was taken each t
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