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:
| Released | Title | Artist | Format | Language |
| --- | --- | --- | --- | --- |
| 20 January 2011 | V.V.I.P | Seungri | Mini Album, Digital Download | Korean |
| 24 February 2011 | Tonight | Big Bang | Mini Album, Digital Download | Korean |
| 8 April 2011 | BIGBANG Special Edition | Big Bang | Studio Album, Digital Download | Korean |
| 11 May 2011 | Big Bang 2 | Big Bang | Studio Album, Digital Download | Japanese |
| 25 May 2011 | The Ultimate: International Best | Big Bang | Compilation | Japanese |
| 30 June 2011 | 2011 Big Show Live Concert | Big Bang | Live Album | Korean |
| 28 July 2011 | 2NE1 | 2NE1 | Extended play, Digital Download | Korean |
| 21 September 2011 | Nolza | 2NE1 | Extended play, Digital Download | Japanese |
| 21 October 2011 | Fever's End: Part 1 | Tablo | Studio Album, Digital Download | Korean |
| 1 November 2011 | Fever's End: Part 2 | Tablo | Studio Album, Digital Download | Korean |
| 21 December 2011 | 1st Live Concert Nolza! | 2NE1 | Live Album | Korean |
| 29 April 2011 | Loveless | Gummy | Mini Album, Digital Download | Japanese |
| 14 December 2011 | The Best of BIGBANG | Big Bang | Compilation | Japanese |
Question:
how many "compilation" albums did yg entertainment release in 2011?
Answer:
2