Assertion: convention | /r/HasProperty | begun in advance
Facets:
value: by alerts
type: OTHER
value: by the use of convention cards
type: MANNER
value: by announcements
type: OTHER
Source sentences:
text: Conventions to be played must be agreed by partners before play begins and must be disclosed to their opponents, either in advance by the use of convention cards or by alerts, announcements, and answers to questions about one's partner's bids once bidding has begun.