Luka Doncic is the youngest in a game with 13+ rebounds, 29+ points and 14+ assists. He was 20 years and 246 days old versus the Lakers on November 1, 2019.

who is the youngest player with 29 points, 13 rebounds, and 14 assists in a game
Interpreted as:
Who is the youngest player with 29 or more points, 13 or more rebounds, and 14 or more assists in a regular-season game?

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