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_1507852_1 (description VARCHAR, attribute VARCHAR)
### Question:
How many descriptions are there when the attribute is "ondragstart"?
### Answer:
SELECT COUNT(description) FROM table_1507852_1 WHERE attribute = "ondragstart"