About: http://webisa.webdatacommons.org/216555218

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The basis for the stepping stone theory is the common finding that hard drug users have usually started with substances such as tobacco and alcohol.
http://www.w3.org/ns/prov#wasQuotedFrom	potsdam.edu