Please list the team names which have at least 3 all-star players.
team with at least 3 all star player refers to tmID where Count(player_allstar.playerID) > = 3
SELECT T1.tmID FROM players_teams AS T1 INNER JOIN player_allstar AS T2 ON T1.playerID = T2.playerID GROUP BY T1.tmID HAVING COUNT(DISTINCT T1.playerID) >= 3