About: http://webisa.webdatacommons.org/349260851

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	Merging two data.tables by a common column, where in one data.table the merge column is a factor and in the other it is not creates unexpected results.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com