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_name_90 (event VARCHAR, opponent VARCHAR, time VARCHAR)
### Question:
Which event had the opponent of shinya aoki and was at 4:56?
### Answer:
SELECT event FROM table_name_90 WHERE opponent = "shinya aoki" AND time = "4:56"