Assertion: sweet birch | /r/HasProperty | b. lenta
Facets:
Source sentences:
text: The twigs , when scraped, have a slight scent of wintergreen oil, though not as strongly so as the related sweet birch ( B. lenta ), which is the only other birch in North America to also smell of wintergreen.   
text: Sweet birch (B. lenta) is native to eastern North America.