About: http://webisa.webdatacommons.org/116017769

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	Its ???natural frequency??? ??? the frequency at which it naturally wants to oscillate ??? depends on such factors as its geometry, the materials with which it was built, and the soil on which it rests.
http://www.w3.org/ns/prov#wasQuotedFrom	apfn.net