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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	Plants also improve air qualityby removing such contaminants as formaldehyde, benzenes, trichloroethylene, nitrogendioxide, and carbon monoxide (Wolverton et al., 1989, in Fjeld, 2000).
http://www.w3.org/ns/prov#wasQuotedFrom	slideshare.net