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:
| Home team | Home team score | Away team | Away team score | Venue | Crowd | Date |
| --- | --- | --- | --- | --- | --- | --- |
| Geelong | 20.6 (126) | St Kilda | 7.12 (54) | Corio Oval | 9500.0 | 9 May 1931 |
| Essendon | 12.5 (77) | Melbourne | 10.13 (73) | Windy Hill | 15000.0 | 9 May 1931 |
| Richmond | 30.19 (199) | North Melbourne | 4.7 (31) | Punt Road Oval | 11000.0 | 9 May 1931 |
| South Melbourne | 13.13 (91) | Footscray | 16.15 (111) | Lake Oval | 20000.0 | 9 May 1931 |
| Hawthorn | 8.17 (65) | Collingwood | 11.18 (84) | Glenferrie Oval | 15000.0 | 9 May 1931 |
| Fitzroy | 13.15 (93) | Carlton | 19.19 (133) | Brunswick Street Oval | 35000.0 | 9 May 1931 |
Question:
What is the date that the away team scored 4.7 (31)?
Answer:
9 May 1931