Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_272313_1 (aspect_ratio VARCHAR, vertical VARCHAR, pixel_aspect_ratio VARCHAR)
### Question:
What was the aspect ratio if the vertical pixel is 480 and pixel aspect ratio is 1:1?
### Answer:
SELECT aspect_ratio FROM table_272313_1 WHERE vertical = 480 AND pixel_aspect_ratio = "1:1"