What is the Bulgarian Commander of the Battle of Rusion?
CREATE TABLE table_name_39 (
    bulgarian_commander VARCHAR,
    battle VARCHAR
)
SELECT bulgarian_commander FROM table_name_39 WHERE battle = "battle of rusion"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the Bulgarian Commander of the Battle of Rusion? ### Input: CREATE TABLE table_name_39 (
    bulgarian_commander VARCHAR,
    battle VARCHAR
) ### Response: SELECT bulgarian_commander FROM table_name_39 WHERE battle = "battle of rusion"