CREATE TABLE CLASS (PROF_NUM VARCHAR2)
CREATE TABLE employee (EMP_FNAME VARCHAR2, EMP_DOB VARCHAR2, EMP_NUM VARCHAR2)

What are the first names and date of birth of professors teaching course ACCT-211?
SELECT DISTINCT T1.EMP_FNAME, T1.EMP_DOB FROM employee AS T1 JOIN CLASS AS T2 ON T1.EMP_NUM = T2.PROF_NUM WHERE CRS_CODE = "ACCT-211"
SELECT DISTINCT "T1"."EMP_FNAME", "T1"."EMP_DOB" FROM "employee" "T1" JOIN "CLASS" "T2" ON "T1"."EMP_NUM" = "T2"."PROF_NUM" WHERE "ACCT-211" = "CRS_CODE"