<http://webisa.webdatacommons.org/198019563> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/317236540> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/198019563> . <http://webisa.webdatacommons.org/198019563> <http://www.w3.org/ns/prov#value> "Culture is a challenge because they are difficult to grow outside of their host plant." . <http://webisa.webdatacommons.org/198019563> <http://www.w3.org/ns/prov#wasQuotedFrom> <infectioncontroltoday.com> .