CREATE TABLE CLASS (class_code VARCHAR, crs_code VARCHAR)
CREATE TABLE student (stu_fname VARCHAR, stu_num VARCHAR, stu_lname VARCHAR)
CREATE TABLE enroll (stu_num VARCHAR, class_code VARCHAR)

What is the first name of the student whose last name starting with the letter S and is taking ACCT-211 class?
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%'
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" AND "T3"."crs_code" = 'ACCT-211' WHERE "T1"."stu_lname" LIKE 'S%'