Table schema:
CREATE TABLE enroll (stu_num VARCHAR, class_code VARCHAR); CREATE TABLE CLASS (class_code VARCHAR, crs_code VARCHAR); CREATE TABLE student (stu_fname VARCHAR, stu_num VARCHAR, stu_lname VARCHAR)

Question: What is the first name of the student whose last name starting with the letter S and is taking ACCT-211 class?
SQL: SELECT T1.stu_fname FROM student AS T1 JOIN enroll AS T2 ON T1.stu_num = T2.stu_num JOIN CLASS AS T3 ON T2.class_code = T3.class_code WHERE T3.crs_code = 'ACCT-211' AND T1.stu_lname LIKE 'S%'