Assertion: diver's cylinder | /r/HasProperty | identified
Facets:
value: before starting work
type: TEMPORAL
value: from permanent stamp markings
type: CAUSE
value: from the labelling
type: OTHER
Source sentences:
text: Before starting work the cylinder must be identified from the labelling and permanent stamp markings, and the ownership and contents verified, and the valve must be removed after depressurising and verifying that the valve is open.