| http://www.w3.org/ns/prov#value | - Once collected, the data is made available for evaluation by other researchers and institutions.Barry???s study focused on data collected from 14,577 high school seniors from 120 public and private schools in the United States.He evaluated whether the students had ever used any of 11 substances, including licit substances such as alcohol and tobacco, as well as illicit substances like marijuana, c
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