About: http://webisa.webdatacommons.org/245254264

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	I see no reason why the B sample would come up negative while the A sample was positive.the reason they do that, is just in case if there was a screw up on the procedure.
http://www.w3.org/ns/prov#wasQuotedFrom	stewarthaasracing.com