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_64 (opponent VARCHAR, time VARCHAR, ground VARCHAR)
### Question:
Who is the Opponent playing at 20:00 GMT at Camp Nou?
### Answer:
SELECT opponent FROM table_name_64 WHERE time = "20:00 gmt" AND ground = "camp nou"