SELECT DISTINCT T1.LName FROM STUDENT AS T1 JOIN VOTING_RECORD AS T2 ON T1.StuID  =  T2.CLASS_President_VOTE
Find the distinct last names of the students who have class president votes.
SELECT DISTINCT T1.LName FROM STUDENT AS T1 JOIN VOTING_RECORD AS T2 ON T1.StuID = T2.CLASS_President_VOTE
select distinct t1 . lname from student as t1 join voting_record as t2 on t1 . stuid = t2 . class_president_vote
Find the distinct last names of the students who have class president votes .