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_4 (number INTEGER, location VARCHAR, time VARCHAR)
### Question:
What number is in Bois de Warville with a time less than 810?
### Answer:
SELECT SUM(number) FROM table_name_4 WHERE location = "bois de warville" AND time < 810