Assertion: alder's bark | /r/HasProperty | thin
Facets:
Source sentences:
text: Bark: Thin and grey
text: Barks are thin, generally smooth, and greenish on young trees, turning grey to whitish with age.
text: The bark is thin and contains multiple black bumpy patches.
text: The bark is thin, smooth, and green-gray, grayish-brown, or reddish-brown (Preston 1948).