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:
| Episode Air Date | Audition City | Audition Date | Audition Venue | Guest Fourth Judge |
| --- | --- | --- | --- | --- |
| June 10, 2010 | Florianópolis | April 10, 2010 | Nego Quirido Sambadrome | Luiza Possi |
| June 15, 2010 | Florianópolis | April 10, 2010 | Nego Quirido Sambadrome | Luiza Possi |
| June 15, 2010 | Rio de Janeiro | April 17, 2010 | João Havelange Olympic Stadium | Marcelo D2 |
| June 17, 2010 | Rio de Janeiro | April 17, 2010 | João Havelange Olympic Stadium | Marcelo D2 |
| June 22, 2010 | Fortaleza | March 27, 2010 | Paulo Sarasate Gymnasium | Reginaldo Rossi |
| June 24, 2010 | Fortaleza | March 27, 2010 | Paulo Sarasate Gymnasium | Reginaldo Rossi |
| June 29, 2010 | São Paulo | April 24, 2010 | Anhembi Sambadrome | Peninha |
Question:
How many episode air dates are there for auditioning city Rio De Janeiro?
Answer:
2.0