user: Question: How many classes are taken in the third year when Pag-unawa was taken in the first year?
Columns: ['Subjects', 'First Year', 'Second Year', 'Third Year', 'Fourth Year']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Science', 'General Science', 'Biology', 'Chemistry', 'Physics']
SQL:

assistant: SELECT COUNT("Third Year") FROM "Table" WHERE "First Year" = 'Pag-unawa';