About: http://webisa.webdatacommons.org/448321057

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	A vacuum pump draws air through a metal disc that has perforations sized to exclude particles above a cutoff size, but to allow smaller particles to pass through where they may be deposited onto a growth medium, such as agar.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com