About: http://webisa.webdatacommons.org/311771070

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	d including 9/11 itself and the days and few weeks afterward as a period of most concern based on high concentrations of key pollutants in the air and dust.
http://www.w3.org/ns/prov#wasQuotedFrom	researchgate.net