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:
Busch Stadium
Table title:
Professional soccer
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Winning Team </th><th colspan=1 rowspan=1 > Result </th><th colspan=1 rowspan=1 > Losing Team </th><th colspan=1 rowspan=1 > Tournament </th><th colspan=1 rowspan=1 > Spectators </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > May 23, 2013 </td><td class="highlighted"  colspan=1 rowspan=1 > England Manchester City </td><td colspan=1 rowspan=1 > 4–3 </td><td class="highlighted"  colspan=1 rowspan=1 > England Chelsea </td><td class="highlighted"  colspan=1 rowspan=1 > Club Friendly </td><td class="highlighted"  colspan=1 rowspan=1 > 48,263 </td></tr>
<tr> <td colspan=1 rowspan=1 > November 18, 2013 </td><td colspan=1 rowspan=1 > Argentina </td><td colspan=1 rowspan=1 > 2–0 </td><td colspan=1 rowspan=1 > Bosnia and Herzegovina </td><td colspan=1 rowspan=1 > International Friendly </td><td colspan=1 rowspan=1 > 30,397 </td></tr>
<tr> <td colspan=1 rowspan=1 > April 4, 2015 </td><td colspan=1 rowspan=1 > United States women </td><td colspan=1 rowspan=1 > 4–0 </td><td colspan=1 rowspan=1 > New Zealand women </td><td colspan=1 rowspan=1 > Women's International Friendly </td><td colspan=1 rowspan=1 > 35,817 </td></tr>
<tr> <td colspan=1 rowspan=1 > November 13, 2015 </td><td colspan=1 rowspan=1 > United States </td><td colspan=1 rowspan=1 > 6–1 </td><td colspan=1 rowspan=1 > Saint Vincent and the Grenadines </td><td colspan=1 rowspan=1 > 2018 FIFA World Cup qualification </td><td colspan=1 rowspan=1 > 43,433 </td></tr>
<tr> <td colspan=1 rowspan=1 > August 1, 2016 </td><td colspan=1 rowspan=1 > Italy Roma </td><td colspan=1 rowspan=1 > 2–1 </td><td colspan=1 rowspan=1 > England Liverpool </td><td colspan=1 rowspan=1 > Club Friendly </td><td colspan=1 rowspan=1 > 29,000 </td></tr>
</table>
Question:
What was the highest attendance for a sports event in Busch Stadium?
Answer:
The highest attendance at Busch Stadium was on May 23, 2013, where 48,263 people watched Chelsea Football Club and Manchester City Football Club play a friendly match.