Assertion: glider | /r/AtLocation | descending slope
Facets:
value: continuously
type: TEMPORAL
value: with being powerful
type: OTHER
value: normally
type: DEGREE
Source sentences:
text: Most gliders do not have an engine, although motor-gliders have small engines for extending their flight when necessary by sustaining the altitude (normally a sailplane is on a continuously descending slope) with some being powerful enough to take off self-launch.