instruction: Concerning ORALPATH 696 , who has never taught the class ?
response: SELECT DISTINCT name FROM instructor WHERE NOT name IN (SELECT INSTRUCTORalias1.name FROM course AS COURSEalias0 INNER JOIN course_offering AS COURSE_OFFERINGalias0 ON COURSEalias0.course_id = COURSE_OFFERINGalias0.course_id INNER JOIN offering_instructor AS OFFERING_INSTRUCTOR ON OFFERING_OFFERING_ID = COURSE_OFFERINGalias0.offering_id INNER JOIN instructor AS INSTRUCTORalias1 ON offering_instructor_id = INSTRUCTORalias1.instructor_id WHERE COURSEalias0.department = 'ORALPATH' AND COURSEalias0.number = 696)