instruction: how many patients whose primary disease is coronary artery disease\coronary artery bypass graft with mvr; ? maze and admission year is less than 2114?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic WHERE demographic.diagnosis = "CORONARY ARTERY DISEASE\CORONARY ARTERY BYPASS GRAFT WITH MVR; ? MAZE" AND demographic.admityear < "2114"