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 | Heat | Cyclist | Nation | Result |
| --- | --- | --- | --- | --- |
| 1.0 | 3.0 | Rebecca Romero | Great Britain | 3:27.703 |
| 2.0 | 4.0 | Wendy Houvenaghel | Great Britain | 3:27.829 |
| 3.0 | 2.0 | Lesya Kalitovska | Ukraine | 3:31.785 |
| 4.0 | 1.0 | Alison Shanks | New Zealand | 3:32.478 |
| 5.0 | 1.0 | Sarah Hammer | United States | 3:34.237 |
| 6.0 | 2.0 | Vilija Sereikaitė | Lithuania | 3:36.808 |
| 7.0 | 3.0 | Katie Mactier | Australia | LAP |
| 8.0 | 4.0 | Lada Kozlíková | Czech Republic | DNF |
Question:
Which nation has a heat of 4, and is ranked 8?
Answer:
Czech Republic