Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE Faculty (FacID VARCHAR)
TABLE: CREATE TABLE Student (advisor VARCHAR)

### Question ###
Show the ids for all the faculty members who have at least 2 students.

### Accurate SQL ###

SELECT T1.FacID FROM Faculty AS T1 JOIN Student AS T2 ON T1.FacID = T2.advisor GROUP BY T1.FacID HAVING COUNT(*) >= 2