Assertion: truffle | /r/HasProperty | difficult to find
Facets:
Source sentences:
text: Truffles grow underground in symbiotic relationships with trees and are difficult to find; as a result, they are usually harvested in the wild by trained hogs and dogs.
text: Truffles are difficult to find and even more difficult to grow, so many chefs will pay a pretty penny for them.
text: They are difficult to find, available only at certain times of the year, and are notoriously difficult to cultivate.