instruction: provide the number of patients whose ethnicity is white and diagnoses long title is esophageal varices in diseases classified elsewhere, with bleeding?
response: SELECT COUNT(DISTINCT demographic.subject_id) FROM demographic INNER JOIN diagnoses ON demographic.hadm_id = diagnoses.hadm_id WHERE demographic.ethnicity = "WHITE" AND diagnoses.long_title = "Esophageal varices in diseases classified elsewhere, with bleeding"