What are the advisors
SELECT advisor FROM Student GROUP BY advisor HAVING count(*)  >=  2
SELECT advisor FROM Student GROUP BY advisor HAVING count(*)  >=  2
[{'Advisor': 1121}, {'Advisor': 1148}, {'Advisor': 2192}, {'Advisor': 2311}, {'Advisor': 5718}, {'Advisor': 7134}, {'Advisor': 7271}, {'Advisor': 8722}, {'Advisor': 8772}]