Assertion: gratuity | /r/HasProperty | given in case
Facets:
Source sentences:
text: A recent study in a restaurant found an average tip of 13.3%, and in all cases (192 tables) a tip was given.
text: In some cases a tip is only given if the customer is satisfied; in others it is customary to give a certain percentage regardless of the quality of the service; and there are situations when it is hard to tell the difference from a bribe.