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:
Kendall Ellis
Table title:
Career
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Competition </th><th colspan=1 rowspan=1 > Venue </th><th colspan=1 rowspan=1 > Position </th><th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <th colspan=6 rowspan=1 > IAAF Championships </th></tr>
<tr> <td colspan=1 rowspan=2 > 2017 </td><td class="highlighted"  colspan=1 rowspan=2 > 2017 World Championships </td><td colspan=1 rowspan=2 > London Stadium </td><td class="highlighted"  colspan=1 rowspan=1 > 1st place </td><td class="highlighted"  colspan=1 rowspan=1 > 4x400 m relay </td><td colspan=1 rowspan=1 > 3:21.67 </td></tr>
<tr> <td colspan=1 rowspan=1 > 22nd place </td><td class="highlighted"  colspan=1 rowspan=1 > 400 metres </td><td colspan=1 rowspan=1 > 52.18 </td></tr>
<tr> <th colspan=6 rowspan=1 > Pan Am U20 Championships </th></tr>
<tr> <td colspan=1 rowspan=2 > 2015 </td><td colspan=1 rowspan=2 > 2015 Pan American U20 Athletics Championships </td><td colspan=1 rowspan=2 > Foote Field Edmonton Alberta </td><td colspan=1 rowspan=1 > 3rd place </td><td colspan=1 rowspan=1 > 400 metres </td><td colspan=1 rowspan=1 > 52.81 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1st place </td><td colspan=1 rowspan=1 > 4x400 m relay </td><td colspan=1 rowspan=1 > 3:31.49 </td></tr>
<tr> <th colspan=6 rowspan=1 > USATF Championships </th></tr>
<tr> <td colspan=1 rowspan=1 > 2018 </td><td colspan=1 rowspan=1 > 2018 USA Outdoor Track and Field Championships </td><td colspan=1 rowspan=1 > Drake University </td><td colspan=1 rowspan=1 > 3rd place </td><td colspan=1 rowspan=1 > 400 metres </td><td colspan=1 rowspan=1 > 50.37 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2017 </td><td colspan=1 rowspan=1 > 2017 USA Outdoor Track and Field Championships </td><td colspan=1 rowspan=1 > Sacramento State University </td><td colspan=1 rowspan=1 > 3rd place </td><td colspan=1 rowspan=1 > 400 metres </td><td colspan=1 rowspan=1 > 50.00 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2015 </td><td colspan=1 rowspan=1 > 2015 USA Junior Outdoor Track and Field Championships </td><td colspan=1 rowspan=1 > University of Oregon </td><td colspan=1 rowspan=1 > 1st place </td><td colspan=1 rowspan=1 > 400 metres </td><td colspan=1 rowspan=1 > 52.32 </td></tr>
</table>
Question:
How did Ellis do at the 2017 World Championships?
Answer:
Ellis competed in the 400 metres and won gold in the 4 × 400 metres relay at the 2017 World Championships.