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_2 (base_pairs INTEGER, strain VARCHAR)
### Question:
What is the largest base pair with a Strain of unspecified?
### Answer:
SELECT MAX(base_pairs) FROM table_name_2 WHERE strain = "unspecified"