About: http://webisa.webdatacommons.org/143325895

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	In Canada, perennial weeds such as Canada thistle (Cirsium arvense (L.) Scop.) and sow thistle (Sonchus arvensis L.) are especially troublesome and their elimination is recommended prior to cultivation.
http://www.w3.org/ns/prov#wasQuotedFrom	cera-gmc.org