CREATE TABLE table_name_21 (ecclesiastical_province VARCHAR, type VARCHAR, latin_name VARCHAR)

What Ecclesiastical Province has a type diocese and a latin name alexiensis?
SELECT ecclesiastical_province FROM table_name_21 WHERE type = "diocese" AND latin_name = "alexiensis"
SELECT "ecclesiastical_province" FROM "table_name_21" WHERE "alexiensis" = "latin_name" AND "diocese" = "type"