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 | Name | Nationality | Time | Notes |
| --- | --- | --- | --- | --- |
| 1 | Janelle Atkinson | Jamaica | 4:16.89 | Q |
| 2 | - | - | - | Q |
| 3 | Kaitlin Sandeno | United States | 4:18.97 | Q |
| 4 | Julia Stowers | United States | 4:19.84 | Q |
| 5 | - | - | - | Q |
| 6 | - | - | - | Q |
| 7 | - | - | - | Q |
| 8 | - | - | - | Q |
Question:
how many ranks have no name?
Answer:
5