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_12148147_2 (third_year VARCHAR, first_year VARCHAR)
### Question:
How many classes are taken in the third year when pag-unawa was taken in the first year?
### Answer:
SELECT COUNT(third_year) FROM table_12148147_2 WHERE first_year = "Pag-unawa"