What is the average change to have a land area of 546.74 and a population density greater than 0.5?
CREATE TABLE table_name_51 (
    change___percentage_ INTEGER,
    land_area__km²_ VARCHAR,
    population_density__per_km²_ VARCHAR
)
SELECT AVG(change___percentage_) FROM table_name_51 WHERE land_area__km²_ = 546.74 AND population_density__per_km²_ > 0.5
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 average change to have a land area of 546.74 and a population density greater than 0.5? ### Input: CREATE TABLE table_name_51 (
    change___percentage_ INTEGER,
    land_area__km²_ VARCHAR,
    population_density__per_km²_ VARCHAR
) ### Response: SELECT AVG(change___percentage_) FROM table_name_51 WHERE land_area__km²_ = 546.74 AND population_density__per_km²_ > 0.5