Assertion: crane's boom | /r/HasProperty | lifted in the air
Facets:
value: to clear low profile
type: PURPOSE
value: to clear the ships
type: PURPOSE
Source sentences:
text: There are two common types of container handling gantry crane: high profile, where the boom is hinged at the waterside of the crane structure and lifted in the air to clear the ships for navigation, and low profile, where the boom is shuttled toward and over the ship to allow the trolley to load and discharge containers.