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 | 5.0 | Natalie Coughlin | United States | 59.43 |
| 2.0 | 4.0 | Reiko Nakamura | Japan | 59.64 |
| 3.0 | 3.0 | Gemma Spofforth | Great Britain | 59.79 |
| 4.0 | 6.0 | Hanae Ito | Japan | 1:00.13 |
| 5.0 | 7.0 | Elizabeth Simmonds | Great Britain | 1:00.39 |
| 6.0 | 2.0 | Julia Wilkinson | Canada | 1:00.60 |
| 7.0 | 1.0 | Sophie Edington | Australia | 1:01.05 |
| 8.0 | 8.0 | Kseniya Moskvina | Russia | 1:01.06 |
Question:
What is the lane total when rank is 2?
Answer:
4.0