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:
| Year | Date | Type | President | Location |
| --- | --- | --- | --- | --- |
| 2010.0 | 11 February | Informal | Herman Van Rompuy (1st term) | Solvay Library , Brussels |
| 2010.0 | 25 March | Euro summit | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2010.0 | 25–26 March | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building , Brussels |
| 2010.0 | 7 May | Euro summit | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2010.0 | 17 June | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2010.0 | 16 September | ― | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2010.0 | 28–29 October | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2010.0 | 16–17 December | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 4 February | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 11 March | Euro summit | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 11 March | Extraordinary | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 24–25 March | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 23–24 June | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 21 July | Euro summit | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 23 October | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 23–26 October | Euro summit | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 26 October | Informal | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 8–9 December | Scheduled | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2011.0 | 9 December | Euro summit | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2012.0 | 30 January | Euro summit | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2012.0 | 30 January | Informal | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2012.0 | 1–2 March | Scheduled | Herman Van Rompuy (1st term) | Solvay Library, Brussels |
| 2012.0 | 2 March | Euro summit | Herman Van Rompuy (1st term) | Solvay Library, Brussels |
| 2012.0 | 23 May | Informal | Herman Van Rompuy (1st term) | Justus Lipsius building, Brussels |
| 2012.0 | 28–29 June | Scheduled | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
| 2012.0 | 28–29 June | Euro summit | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
| 2012.0 | 18–19 October | Scheduled | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
| 2012.0 | 22–23 November | Scheduled | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
| 2012.0 | 13–14 December | Scheduled | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
| 2013.0 | 7–8 February | Scheduled | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
| 2013.0 | 14 March | Euro summit | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
| 2013.0 | 14–15 March | Scheduled | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
| 2013.0 | 22 May | Scheduled | Herman Van Rompuy (2nd term) | Justus Lipsius building, Brussels |
Question:
What is the sum of Year with a Type of informal, and a Location with justus lipsius building, brussels, and a Date with 23 may?
Answer:
2012.0