Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE Student (StuID VARCHAR, advisor VARCHAR); CREATE TABLE Faculty (FacID VARCHAR, rank VARCHAR)
### Question:
Show the ids of students whose advisors are professors.
### Answer:
SELECT T2.StuID FROM Faculty AS T1 JOIN Student AS T2 ON T1.FacID = T2.advisor WHERE T1.rank = "Professor"