About: http://webisa.webdatacommons.org/210204530

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	Black streaks, roof fungus, mildews and other discoloration is an accumulation of the algae's dead, dark to black colored cells.
http://www.w3.org/ns/prov#wasQuotedFrom	cleanertoday.com