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:
Luke Mathews
Table title:
International competitions
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> <td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > World Junior Championships </td><td colspan=1 rowspan=1 > Eugene, United States </td><td colspan=1 rowspan=1 > 8th (sf) </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 1:55.92 </td></tr>
<tr> <td colspan=1 rowspan=2 > 2016 </td><td colspan=1 rowspan=2 > Olympic Games </td><td colspan=1 rowspan=2 > Rio de Janeiro, Brazil </td><td colspan=1 rowspan=1 > 7th (h) </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 1:50.17 </td></tr>
<tr> <td colspan=1 rowspan=1 > 13th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:44.51 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2017 </td><td class="highlighted"  colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > London, United Kingdom </td><td colspan=1 rowspan=1 > 19th (sf) </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:40.91 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 2018 </td><td class="highlighted"  colspan=1 rowspan=2 > Commonwealth Games </td><td colspan=1 rowspan=2 > Gold Coast, Australia </td><td colspan=1 rowspan=1 > 3rd </td><td colspan=1 rowspan=1 > 800 m </td><td colspan=1 rowspan=1 > 1:45.60 </td></tr>
<tr> <td colspan=1 rowspan=1 > 12th </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 3:47.04 </td></tr>
</table>
Question:
Which competition did Luke Mathews compete in at the 2017 World Championships and 2018 Commonwealth Games?
Answer:
Luke Mathews competed in the 1500m at the 2017 World Championships and 2018 Commonwealth Games.