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:
| Stage | Date | Course | Distance | Winner | Race Leader |
| --- | --- | --- | --- | --- | --- |
| 1 | 14 May | Milan to Vicenza | km (mi) | Learco Guerra ( ITA ) | Learco Guerra ( ITA ) |
| 2 | 15 May | Vicenza to Udine | km (mi) | Hermann Buse ( GER ) | Hermann Buse ( GER ) |
| 3 | 17 May | Udine to Ferrara | km (mi) | Fabio Battesini ( ITA ) | Hermann Buse ( GER ) |
| 4 | 18 May | Ferrara to Rimini | km (mi) | Learco Guerra ( ITA ) | Hermann Buse ( GER ) |
| 5 | 20 May | Rimini to Teramo | km (mi) | Raffaele Di Paco ( ITA ) | Hermann Buse ( GER ) |
| 6 | 22 May | Teramo to Lanciano | km (mi) | Learco Guerra ( ITA ) | Hermann Buse ( GER ) |
| 7 | 24 May | Lanciano to Foggia | km (mi) | Antonio Pesenti ( ITA ) | Antonio Pesenti ( ITA ) |
| 8 | 26 May | Foggia to Naples | km (mi) | Learco Guerra ( ITA ) | Antonio Pesenti ( ITA ) |
| 9 | 28 May | Naples to Rome | km (mi) | Learco Guerra ( ITA ) | Antonio Pesenti ( ITA ) |
| 10 | 30 May | Rome to Florence | km (mi) | Ettore Meini ( ITA ) | Antonio Pesenti ( ITA ) |
| 11 | 1 June | Florence to Genoa | km (mi) | Remo Bertoni ( ITA ) | Antonio Pesenti ( ITA ) |
| 12 | 3 June | Genoa to Turin | km (mi) | Ettore Meini ( ITA ) | Antonio Pesenti ( ITA ) |
| 13 | 5 June | Turin to Milan | km (mi) | Learco Guerra ( ITA ) | Antonio Pesenti ( ITA ) |
| Total | Total | km (mi) | km (mi) | km (mi) | km (mi) |
Question:
Which date has a Race Leader of hermann buse ( ger ), and a Stage of 5?
Answer:
20 May