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_78 (spike INTEGER, date_of_birth VARCHAR, block VARCHAR)
### Question:
How many spikes have 28.09.1981 as the date of birth, with a block greater than 318?
### Answer:
SELECT SUM(spike) FROM table_name_78 WHERE date_of_birth = "28.09.1981" AND block > 318