Assertion: black walnut's leaf | /r/CapableOf | emit warning pheromones
Facets:
value: to trees downwind
type: TRANSITIVE-OBJECT
value: specifically
type: MANNER
Source sentences:
text: In fact, upon being munched on, the leaves of acacia trees will emit warning pheromones (ethylene gas, specifically) to any trees downwind, alerting them to start producing tannins as well.