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:
| Rank | Lane | Name | Nationality | Time |
| --- | --- | --- | --- | --- |
| 1.0 | 4.0 | Kristy Kowal | United States | 2:25.46 |
| 2.0 | 6.0 | Sarah Poewe | South Africa | 2:25.54 |
| 3.0 | 7.0 | Luo Xuejuan | China | 2:25.86 |
| 4.0 | 5.0 | Karine Brémond | France | 2:27.86 |
| 5.0 | 3.0 | Caroline Hildreth | Australia | 2:28.30 |
| 6.0 | 2.0 | Ku Hyo-Jin | South Korea | 2:28.50 |
| 7.0 | 1.0 | Anne Poleska | Germany | 2:28.99 |
| 8.0 | 8.0 | Junko Isoda | Japan | 2:31.71 |
Question:
What did Ku Hyo-Jin rank?
Answer:
1.0