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 | Athlete | Time | Notes | Q |
| --- | --- | --- | --- | --- |
| 1 | Habtamu Fayisa (ETH) | 5:38.62 | PB | FA |
| 2 | Peter Matheka Mutuku (KEN) | 5:38.72 | PB | FA |
| 3 | Zakaria Kiprotich (UGA) | 5:44.51 | PB | FA |
| 4 | Waleed Elayah (YEM) | 5:51.58 | PB | FA |
| 5 | Bilal Tabti (ALG) | 5:56.21 | PB | FA |
| 6 | Yousif Daifalla (SUD) | 5:56.46 | PB | FA |
| 7 | Salem Attiatalla (EGY) | 6:03.41 |  | FA |
| 8 | Daniel Wong (USA) | 6:05.92 | PB | FA |
| 9 | David Morcillo (ESP) | 6:10.90 |  | FB |
| 10 | Laurentiu Rosu (ROU) | 6:12.77 |  | FB |
| 11 | Grant Gwynne (AUS) | 6:16.83 |  | FB |
| 12 | Ioran Etchechury (BRA) | 6:39.87 |  | FB |
| 13 | Bacem Salhi (TUN) | 6:43.17 |  | FB |
|  | Ahmed Burhan (KSA) | DSQ |  | FB |
|  | Zak Seddon (GBR) | DSQ |  | FB |
Question:
how many athletes have a time below 5:56:21 ?
Answer:
4