Assertion: fern's stem | /r/HasProperty | green
Facets:
value: in color
type: OTHER
value: on the top
type: LOCATION
value: usually
type: DEGREE
Source sentences:
text: The stems are usually green and photosynthetic, and are distinctive in being hollow, jointed and ridged (with sometimes 3 but usually 6–40 ridges).
text: Stem of Christmas fern is short, scaly, woody at the base and green on the top.
text: Stem is green in color and it plays role in photosynthesis (production of food by using sunlight and carbon dioxide).