About: http://webisa.webdatacommons.org/39527191

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	Median annual earnings of janitors and cleaners, except maids and housekeeping cleaners, were $19,930 in May 2006.
http://www.w3.org/ns/prov#wasQuotedFrom	careers.org