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:
| Distance | Time | Date | Location | Notes |
| --- | --- | --- | --- | --- |
| Men's Speed skating | Men's Speed skating | Men's Speed skating | Men's Speed skating | Men's Speed skating |
| Distance | Time | Date | Location | Notes |
| 500 m | 45.7 | 1931-02-01 | Davos | Davos Eisstadion |
| 1,000 m | 1:35.6 | 1930-01-11 | Davos | Eisstadion |
| 1,500 m | 2:27.9 | 1928-02-14 | St. Moritz | St. Moritz Olympic Ice Rink |
| 3,000 m | 5:51.2 | 1932-01-08 | Davos | Eisstadion |
| 5,000 m | 9:04.3 | 1931-02-02 | Davos | Eisstadion |
| 10,000 m | 19:10.2 | 1928-02-05 | Davos | Eisstadion |
Question:
Which Date has a Location of davos, and a Time of 45.7?
Answer:
1931-02-01