user
Instruction
Answer the question based on the provided table.


Table
Table Title: World Golf Championships
Table Content:
| Golfer | Country | Wins | Match Play | Championship | Invitational | Champions |
| --- | --- | --- | --- | --- | --- | --- |
| Tiger Woods | United States | 18 | 3: 2003, 2004, 2008 | 7: 1999, 2002, 2003,\n2005, 2006, 2007, 2013 | 8: 1999, 2000, 2001, 2005,\n2006, 2007, 2009, 2013 | — |
| Geoff Ogilvy | Australia | 3 | 2: 2006, 2009 | 1: 2008 | — | — |
| Darren Clarke | Northern Ireland | 2 | 1: 2000 | — | 1: 2003 | — |
| Ernie Els | South Africa | 2 | — | 2: 2004, 2010 | — | — |
| Hunter Mahan | United States | 2 | 1: 2012 | — | 1: 2010 | — |
| Phil Mickelson | United States | 2 | — | 1: 2009 | — | 1: 2009 |
| Ian Poulter | England | 2 | 1: 2010 | — | — | 1: 2012 |


Question
how many championships ernie els won?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["2"]