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 has_pet (petid VARCHAR, stuid VARCHAR); CREATE TABLE student (stuid VARCHAR, Lname VARCHAR)
### Question:
Find the id of the pet owned by student whose last name is ‘Smith’.
### Answer:
SELECT T2.petid FROM student AS T1 JOIN has_pet AS T2 ON T1.stuid = T2.stuid WHERE T1.Lname = 'Smith'