Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
How many classes are taken in the third year when pag-unawa was taken in the first year?

### Inputs:
table_name: table, columns: ['Subjects', 'First Year', 'Second Year', 'Third Year', 'Fourth Year']

### Response:
SELECT COUNT Third Year FROM table WHERE First Year = Pag-unawa