Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Subjects | First Year | Second Year | Third Year | Fourth Year |
| --- | --- | --- | --- | --- |
| Science | General Science | Biology | Chemistry | Physics |
| Mathematics | Elementary Algebra | Intermediate Algebra | Geometry | Advanced Algebra |
| English | Grammar and Philippine Literature | Grammar and Afro-Asian Literature | Grammar and American Literature | Grammar and World Literature |
| Filipino | Pag-unawa | Gramatika | Panitikang Pilipino | Panitikang Asyano |
| Social Studies (AP) | Philippine History and Government | Asian History | World History | Economics |
Question:
How many classes are taken in the third year when pag-unawa was taken in the first year?
Answer:
1.0