CREATE TABLE table_name_15 (junior_high_school__12_15_yrs_ VARCHAR2, university_students_and_adults__18yrs VARCHAR2, _ VARCHAR2)

Which junior high school has university students and adults of 26mm?
SELECT junior_high_school__12_15_yrs_ FROM table_name_15 WHERE university_students_and_adults__18yrs + _ = "26mm"
SELECT "junior_high_school__12_15_yrs_" FROM "table_name_15" WHERE "26mm" = "university_students_and_adults__18yrs" + "_"