About: http://webisa.webdatacommons.org/355461487

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	Lettuce, spinach, cabbage and other leafy vegetables have been vacuum cooled since the early 1940s.
http://www.w3.org/ns/prov#wasQuotedFrom	foodprocessing.com