Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
List of WWE pay-per-view and WWE Network events
Table title:
2011
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Venue </th><th colspan=1 rowspan=1 > Location </th><th colspan=1 rowspan=1 > Main event </th></tr>
<tr> <td colspan=1 rowspan=1 > January 30 </td><td colspan=1 rowspan=1 > Royal Rumble </td><td colspan=1 rowspan=1 > TD Garden </td><td colspan=1 rowspan=1 > Boston, Massachusetts </td><td colspan=1 rowspan=1 > 40-man Royal Rumble match </td></tr>
<tr> <td colspan=1 rowspan=1 > February 20 </td><td colspan=1 rowspan=1 > Elimination Chamber </td><td colspan=1 rowspan=1 > Oracle Arena </td><td colspan=1 rowspan=1 > Oakland, California </td><td colspan=1 rowspan=1 > CM Punk vs. John Cena vs. John Morrison vs. Sheamus vs. Randy Orton vs. R-Truth </td></tr>
<tr> <td colspan=1 rowspan=1 > April 3 </td><td colspan=1 rowspan=1 > WrestleMania XXVII </td><td colspan=1 rowspan=1 > Georgia Dome </td><td colspan=1 rowspan=1 > Atlanta, Georgia </td><td colspan=1 rowspan=1 > The Miz vs. John Cena for the WWE Championship </td></tr>
<tr> <td colspan=1 rowspan=1 > May 1 </td><td colspan=1 rowspan=1 > Extreme Rules </td><td colspan=1 rowspan=1 > St. Pete Times Forum </td><td colspan=1 rowspan=1 > Tampa, Florida </td><td colspan=1 rowspan=1 > The Miz vs. John Cena vs. John Morrison for the WWE Championship </td></tr>
<tr> <td colspan=1 rowspan=1 > May 22 </td><td colspan=1 rowspan=1 > Over the Limit </td><td colspan=1 rowspan=1 > KeyArena </td><td colspan=1 rowspan=1 > Seattle, Washington </td><td colspan=1 rowspan=1 > John Cena vs. The Miz for the WWE Championship </td></tr>
<tr> <td colspan=1 rowspan=1 > June 19 </td><td colspan=1 rowspan=1 > Capitol Punishment </td><td colspan=1 rowspan=1 > Verizon Center </td><td colspan=1 rowspan=1 > Washington, D.C. </td><td colspan=1 rowspan=1 > John Cena vs. R-Truth for the WWE Championship </td></tr>
<tr> <td colspan=1 rowspan=1 > July 17 </td><td colspan=1 rowspan=1 > Money in the Bank </td><td colspan=1 rowspan=1 > Allstate Arena </td><td colspan=1 rowspan=1 > Rosemont, Illinois </td><td colspan=1 rowspan=1 > John Cena vs. CM Punk for the WWE Championship </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > August 14 </td><td class="highlighted"  colspan=1 rowspan=1 > SummerSlam </td><td colspan=1 rowspan=1 > Staples Center </td><td colspan=1 rowspan=1 > Los Angeles, California </td><td colspan=1 rowspan=1 > CM Punk vs. Alberto Del Rio for the WWE Championship </td></tr>
<tr> <td colspan=1 rowspan=1 > September 18 </td><td colspan=1 rowspan=1 > Night of Champions </td><td colspan=1 rowspan=1 > First Niagara Center </td><td colspan=1 rowspan=1 > Buffalo, New York </td><td colspan=1 rowspan=1 > Triple H vs. CM Punk </td></tr>
<tr> <td colspan=1 rowspan=1 > October 2 </td><td colspan=1 rowspan=1 > Hell in a Cell </td><td colspan=1 rowspan=1 > New Orleans Arena </td><td colspan=1 rowspan=1 > New Orleans, Louisiana </td><td colspan=1 rowspan=1 > John Cena vs. Alberto Del Rio vs. CM Punk for the WWE Championship </td></tr>
<tr> <td colspan=1 rowspan=1 > October 23 </td><td colspan=1 rowspan=1 > Vengeance </td><td colspan=1 rowspan=1 > AT&T Center </td><td colspan=1 rowspan=1 > San Antonio, Texas </td><td colspan=1 rowspan=1 > Alberto Del Rio vs. John Cena for the WWE Championship </td></tr>
<tr> <td colspan=1 rowspan=1 > November 20 </td><td colspan=1 rowspan=1 > Survivor Series </td><td colspan=1 rowspan=1 > Madison Square Garden </td><td colspan=1 rowspan=1 > New York, New York </td><td colspan=1 rowspan=1 > John Cena and The Rock vs. Awesome Truth (The Miz and R-Truth) </td></tr>
<tr> <td colspan=1 rowspan=1 > December 18 </td><td colspan=1 rowspan=1 > TLC: Tables, Ladders & Chairs </td><td colspan=1 rowspan=1 > 1st Mariner Arena </td><td colspan=1 rowspan=1 > Baltimore, Maryland </td><td colspan=1 rowspan=1 > CM Punk vs. The Miz vs. Alberto Del Rio for the WWE Championship </td></tr>
</table>
Question:
What wrestling pay-per-view (PPV) event took place at Staples Center in 2011 and when did it happen?
Answer:
SummerSlam was a wrestling pay-per-view (PPV) event by WWE that took place on August 14, 2011 at Staples Center.