About: http://webisa.webdatacommons.org/176837103

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	In addition, soil gas ventilation systems should be combined with proper foundation design and construction techniques to limit possible admission of radon, water vapor, herbicides, methane, and other toxins.
http://www.w3.org/ns/prov#wasQuotedFrom	umn.edu