| http://www.w3.org/ns/prov#value | - At each childhood assessment wave (ages 10-13 years), participants were asked, ???Have you ever drunk alcohol, other than just a sip or two? (Do not include childhood sips that you might have had from an older person's drink.)??? Participants responding yes were asked to report how old they were the first time they had ???a glass of beer or wine or a drink of liquor, such as whiskey, gin, scotch,
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