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An athletic association has a database of track meets. Each track meet has events. Each event has preliminary rounds called heats. Track meets have unique

An athletic association has a database of track meets. Each track meet has events. Each event has preliminary rounds called "heats". Track meets have unique names but usually use the same event codes. Heats are named with an event code and a heat number.TrackMeet
Event
Heat
Select the correct identifying entity.

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