Assertion: willow's catkin | /r/HasProperty | yellow
Facets:
value: on account of the pollen
type: CAUSE
Source sentences:
text: The dwarf dappled willow produces yellow catkins in April, followed by pink spring foliage that turns green and creamy-white in the summer.
text: The male catkins are yellow on account of the pollen, while the female catkins are pale gray with a green hue.
text: The catkins are smaller than most willow plants and are purple or red rather than white or yellow.
text: Male catkins are yellow, while female catkins are red.