Assertion: birch's trunk | /r/HasProperty | single stem/
Facets:
Source sentences:
text: Birch trees share some common characteristics: they are a medium-sized tree that reaches a height of from 40 to 50 feet, their leaves turn yellow in the fall season, and they can be purchased with a single stem/trunk or as a clump birch, which has from three to five stems/trunks.