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:
| Date | Course | Distance | Type | Winner |
| --- | --- | --- | --- | --- |
| 12 May | Brescia | km (mi) | Individual time trial | Stage Cancelled |
| 13 May | Brescia to Mantua | km (mi) | Team time trial | Bianchi-Piaggio |
| 14 May | Mantua to Comacchio | km (mi) | Plain stage | Guido Bontempi ( ITA ) |
| 15 May | Comacchio to Fano | km (mi) | Plain stage | Paolo Rosola ( ITA ) |
| 16 May | Pesaro to Todi | km (mi) | Stage with mountain(s) | Giuseppe Saronni ( ITA ) |
| 17 May | Terni to Vasto | km (mi) | Stage with mountain(s) | Eduardo Chozas ( ESP ) |
| 18 May | Vasto to Campitello Matese | km (mi) | Stage with mountain(s) | Alberto Fernández ( ESP ) |
| 19 May | Campitello Matese to Salerno | km (mi) | Stage with mountain(s) | Moreno Argentin ( ITA ) |
| 20 May | Salerno to Terracina | km (mi) | Plain stage | Guido Bontempi ( ITA ) |
| 21 May | Terracina to Montefiascone | km (mi) | Stage with mountain(s) | Riccardo Magrini ( ITA ) |
| 22 May | Montefiascone to Bibbiena | km (mi) | Stage with mountain(s) | Palmiro Masciarelli ( ITA ) |
| 23 May | Bibbiena to Pietrasanta | km (mi) | Stage with mountain(s) | Lucien Van Impe ( BEL ) |
| 24 May | Rest day | Rest day | Rest day | Rest day |
| 25 May | Pietrasanta to Reggio Emilia | km (mi) | Stage with mountain(s) | Alf Segersäll ( SWE ) |
| 26 May | Reggio Emilia to Parma | km (mi) | Individual time trial | Giuseppe Saronni ( ITA ) |
| 27 May | Parma to Savona | km (mi) | Stage with mountain(s) | Gregor Braun ( FRG ) |
| 28 May | Savona to Orta San Giulio | km (mi) | Stage with mountain(s) | Paolo Rosola ( ITA ) |
| 29 May | Orta San Giulio to Milan | km (mi) | Plain stage | Frank Hoste ( BEL ) |
| 29 May | Milan to Bergamo | km (mi) | Stage with mountain(s) | Giuseppe Saronni ( ITA ) |
| 30 May | Bergamo to Colli di San Fermo | km (mi) | Stage with mountain(s) | Alberto Fernández ( ESP ) |
| 31 May | Sarnico to Vicenza | km (mi) | Stage with mountain(s) | Paolo Rosola ( ITA ) |
| 1 June | Rest day | Rest day | Rest day | Rest day |
| 2 June | Vicenza to Selva di Val Gardena | km (mi) | Stage with mountain(s) | Mario Beccia ( ITA ) |
| 3 June | Selva di Val Gardena to Arabba | km (mi) | Stage with mountain(s) | Alessandro Paganessi ( ITA ) |
| 4 June | Arabba to Gorizia | km (mi) | Plain stage | Moreno Argentin ( ITA ) |
| 5 June | Gorizia to Udine | km (mi) | Individual time trial | Roberto Visentini ( ITA ) |
| Total | Total | km (mi) | km (mi) | km (mi) |
Question:
When did the course Vasto to Campitello Matese took place?
Answer:
18 May