What is the Byzantine Commander with a Bulgarian Victory at the Siege of Lovech?
CREATE TABLE table_name_44 (
    byzantine_commander VARCHAR,
    result VARCHAR,
    battle VARCHAR
)
SELECT byzantine_commander FROM table_name_44 WHERE result = "bulgarian victory" AND battle = "siege of lovech"
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 Byzantine Commander with a Bulgarian Victory at the Siege of Lovech? ### Input: CREATE TABLE table_name_44 (
    byzantine_commander VARCHAR,
    result VARCHAR,
    battle VARCHAR
) ### Response: SELECT byzantine_commander FROM table_name_44 WHERE result = "bulgarian victory" AND battle = "siege of lovech"