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:
Morgan Langley (soccer)
Table title:
Club
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=3 rowspan=1 > Club performance </th><th colspan=2 rowspan=1 > League </th><th colspan=2 rowspan=1 > Cup </th><th colspan=2 rowspan=1 > League Cup </th><th colspan=2 rowspan=1 > Continental </th><th colspan=2 rowspan=1 > Other </th><th colspan=2 rowspan=1 > Total </th></tr>
<tr> <th colspan=1 rowspan=1 > Season </th><th colspan=1 rowspan=1 > Club </th><th colspan=1 rowspan=1 > League </th><th colspan=1 rowspan=1 > Apps </th><th colspan=1 rowspan=1 > Goals </th><th colspan=1 rowspan=1 > Apps </th><th colspan=1 rowspan=1 > Goals </th><th colspan=1 rowspan=1 > Apps </th><th colspan=1 rowspan=1 > Goals </th><th colspan=1 rowspan=1 > Apps </th><th colspan=1 rowspan=1 > Goals </th><th colspan=1 rowspan=1 > Apps </th><th colspan=1 rowspan=1 > Goals </th><th colspan=1 rowspan=1 > Apps </th><th colspan=1 rowspan=1 > Goals </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > Harrisburg City Islanders </td><td class="highlighted"  colspan=1 rowspan=1 > USL Pro </td><td colspan=1 rowspan=1 > 20 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 21 </td><td colspan=1 rowspan=1 > 2 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2011 </td><td class="highlighted"  colspan=1 rowspan=1 > Philadelphia Union </td><td class="highlighted"  colspan=1 rowspan=1 > Major League Soccer </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 0 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012 </td><td colspan=1 rowspan=3 > Harrisburg City Islanders </td><td colspan=1 rowspan=3 > USL Pro </td><td colspan=1 rowspan=1 > 19 </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 22 </td><td colspan=1 rowspan=1 > 4 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2013 </td><td colspan=1 rowspan=1 > 23 </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 23 </td><td colspan=1 rowspan=1 > 4 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > 28 </td><td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 30 </td><td colspan=1 rowspan=1 > 9 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2015 </td><td colspan=1 rowspan=1 > St Patrick's Athletic </td><td colspan=1 rowspan=1 > League of Ireland </td><td colspan=1 rowspan=1 > 18 </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > 0 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > 27 </td><td colspan=1 rowspan=1 > 5 </td></tr>
<tr> <th colspan=1 rowspan=1 > Total </th><th colspan=2 rowspan=1 > USA </th><th colspan=1 rowspan=1 > 91 </th><th colspan=1 rowspan=1 > 16 </th><th colspan=1 rowspan=1 > 6 </th><th colspan=1 rowspan=1 > 3 </th><th colspan=1 rowspan=1 > 0 </th><th colspan=1 rowspan=1 > 0 </th><th colspan=1 rowspan=1 > 0 </th><th colspan=1 rowspan=1 > 0 </th><th colspan=1 rowspan=1 > 0 </th><th colspan=1 rowspan=1 > 0 </th><th colspan=1 rowspan=1 > 97 </th><th colspan=1 rowspan=1 > 19 </th></tr>
<tr> <th colspan=3 rowspan=1 > Career total </th><th colspan=1 rowspan=1 > 109 </th><th colspan=1 rowspan=1 > 19 </th><th colspan=1 rowspan=1 > 8 </th><th colspan=1 rowspan=1 > 3 </th><th colspan=1 rowspan=1 > 4 </th><th colspan=1 rowspan=1 > 0 </th><th colspan=1 rowspan=1 > 1 </th><th colspan=1 rowspan=1 > 0 </th><th colspan=1 rowspan=1 > 2 </th><th colspan=1 rowspan=1 > 2 </th><th colspan=1 rowspan=1 > 124 </th><th colspan=1 rowspan=1 > 24 </th></tr>
</table>
Question:
Which team did Langley join after the end of the 2011 USL Pro season?
Answer:
After the end of the 2011 USL Pro season, Langley joined the Philadelphia Union of Major League Soccer.