instruction: what is the number of patients whose admission location is phys referral/normal deli and diagnoses long title is unspecified congenital anomaly of heart?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id WHERE demographic.admission_location = "PHYS REFERRAL/NORMAL DELI" AND diagnoses.long_title = "Unspecified congenital anomaly of heart"