Assertion: mistletoe's seed | /r/CapableOf | pass through digestive tract of birds
Facets:
Source sentences:
text: It wasn’t until the sixteenth century that botanists discovered that mistletoe was actually spread by seeds which had passed through the digestive tract of birds after they ate the berries.
text: By the sixteenth century, botanists had discovered that the mistletoe plant was spread by seeds which had passed through the digestive tract of birds.