About: http://webisa.webdatacommons.org/446849321

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	For instance, the acid halides are prepared by reacting a thiophene-2-carboxylic acid with a halogenating agent such as thionyl chloride, phosphorus trichloride, phosphorus pentabromide, oxalyl chloride, and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com