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_1 (round VARCHAR, position VARCHAR, pick__number VARCHAR)
### Question:
In what Round was a Defensive Tackle Pick # less than 19?
### Answer:
SELECT COUNT(round) FROM table_name_1 WHERE position = "defensive tackle" AND pick__number < 19