Table schema:
CREATE TABLE table_name_15 (appointed_by VARCHAR, title VARCHAR, termination_of_mission VARCHAR)

Question: Who was appointed with the title of envoy extraordinary and minister plenipotentiary, and a termination of mission of march 16, 1905?
SQL: SELECT appointed_by FROM table_name_15 WHERE title = "envoy extraordinary and minister plenipotentiary" AND termination_of_mission = "march 16, 1905"