Assertion: soft plumaged petrel | /r/CapableOf | show a trace of an mmark
Facets:
value: across the upperwings
type: LOCATION
value: usually
type: DEGREE
Source sentences:
text: Soft-plumaged petrel has more extensive pale chin and cheeks, and usually shows a trace of an 'M' mark across the upperwings (never apparent in taiko).