Assertion: astronaut's crew | /r/CapableOf | activate the auxiliary power units
Facets:
value: at t
type: TEMPORAL
value: to provide pressure
type: PURPOSE
Source sentences:
text: At T minus 5 minutes, the crew activates the Auxiliary Power Units (APU) to provide pressure to the Shuttle's three hydraulic systems which move the main engine nozzles and the aero-aerosurfaces.