About: http://webisa.webdatacommons.org/288663407

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	Rick DensingDecember 18th, 2002, 07:24 AMIn my case, I usually have a light curtain or other safety device between the operator and the machine.
http://www.w3.org/ns/prov#wasQuotedFrom	plctalk.net