About: http://webisa.webdatacommons.org/22049990

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	The main sources of radon in homes and buildings are the ground soil and rock, ground water and building materials such as concrete and cement blocks.
http://www.w3.org/ns/prov#wasQuotedFrom	fix-your-radon.com