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_91 (outcome VARCHAR, surface VARCHAR, date VARCHAR)
### Question:
What is the total outcome for the clay surface on April 21, 1996?
### Answer:
SELECT outcome FROM table_name_91 WHERE surface = "clay" AND date = "april 21, 1996"