Assertion: convoy | /r/HasProperty | escorted in part
Facets:
value: by airships
type: OTHER
value: after june
type: TEMPORAL
value: by land-based airplanes
type: OTHER
value: by sea planes
type: OTHER
Source sentences:
text: After June 1918, almost all convoys were escorted in part by land-based airplanes and airships, as well as sea planes.