Assertion: black walnut tree | /r/CapableOf | produce toxic substance
Facets:
Source sentences:
text: Black walnut trees (Juglans nigra) produce a toxic substance (called juglone) that prevents many plants from growing under or near them.
text: Black walnut trees (Juglans nigra) produce a toxic substance (called juglone) that prevents many plants from growing under or near them.