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:
| Heat | Lane | Name | Country | Mark |
| --- | --- | --- | --- | --- |
| 1.0 | 5.0 | Olesya Zykina | Russia | 51.75 |
| 1.0 | 3.0 | Antonina Yefremova | Ukraine | 51.79 PB |
| 1.0 | 6.0 | Moushaumi Robinson | United States | 51.85 PB |
| 1.0 | 1.0 | Racheal Nachula | Zambia | 53.30 NR |
| 1.0 | 2.0 | Makelesi Batimala | Fiji | 54.23 |
| 1.0 | 4.0 | Christy Ekpukhon Ihunaeqbo | Nigeria | DNS |
| 2.0 | 6.0 | Natalya Nazarova | Russia | 51.62 |
| 2.0 | 3.0 | Shareese Woods | United States | 51.87 PB |
| 2.0 | 4.0 | Angela Morosanu | Romania | 52.83 SB |
| 2.0 | 2.0 | Zuzana Hejnová | Czech Republic | 53.16 |
| 2.0 | 5.0 | Amantle Montsho | Botswana | 53.21 |
| 2.0 | 1.0 | Nataliya Pyhyda | Ukraine | 53.33 |
Question:
What is the average lane racheal nachula has when the heat is less than 2?
Answer:
1.0