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:
Dahlia Duhaney
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> <th colspan=6 rowspan=1 > Representing Jamaica </th></tr>
<tr> <td colspan=1 rowspan=1 > 1988 </td><td colspan=1 rowspan=1 > World Junior Championships </td><td colspan=1 rowspan=1 > Sudbury, Canada </td><td colspan=1 rowspan=1 > 16th (q) </td><td colspan=1 rowspan=1 > Long jump </td><td colspan=1 rowspan=1 > 5.93 m (+1.4 m/s) </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=4 > 1991 </td><td colspan=1 rowspan=3 > Pan American Games </td><td colspan=1 rowspan=3 > Havana, Cuba </td><td colspan=1 rowspan=1 > 4th </td><td colspan=1 rowspan=1 > 100 m </td><td colspan=1 rowspan=1 > 11.62 </td></tr>
<tr> <td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 23.77 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 4 x 100 m </td><td colspan=1 rowspan=1 > 43.79 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > World Championships </td><td class="highlighted"  colspan=1 rowspan=1 > Tokyo, Japan </td><td class="highlighted"  colspan=1 rowspan=1 > 1st </td><td class="highlighted"  colspan=1 rowspan=1 > 4 x 100 m </td><td colspan=1 rowspan=1 > 41.94 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1992 </td><td colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > Barcelona, Spain </td><td colspan=1 rowspan=1 > — </td><td colspan=1 rowspan=1 > 4 x 100 m </td><td colspan=1 rowspan=1 > DNF </td></tr>
<tr> <td colspan=1 rowspan=2 > 1993 </td><td colspan=1 rowspan=2 > World Student Games </td><td colspan=1 rowspan=2 > Buffalo, United States </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 100 m </td><td colspan=1 rowspan=1 > 11.56 </td></tr>
<tr> <td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 22.79 w </td></tr>
<tr> <td colspan=1 rowspan=3 > 1994 </td><td colspan=1 rowspan=3 > Commonwealth Games </td><td colspan=1 rowspan=3 > Victoria, Canada </td><td colspan=1 rowspan=1 > 5th </td><td colspan=1 rowspan=1 > 100 m </td><td colspan=1 rowspan=1 > 11.34 </td></tr>
<tr> <td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 22.85 </td></tr>
<tr> <td colspan=1 rowspan=1 > 4th </td><td colspan=1 rowspan=1 > 4 x 100 m </td><td colspan=1 rowspan=1 > 43.51 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1995 </td><td colspan=1 rowspan=1 > Pan American Games </td><td colspan=1 rowspan=1 > Mar del Plata, Argentina </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 200 m </td><td colspan=1 rowspan=1 > 23.03 </td></tr>
<tr> <td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Gothenburg, Sweden </td><td colspan=1 rowspan=1 > 2nd </td><td colspan=1 rowspan=1 > 4 x 100 m </td><td colspan=1 rowspan=1 > 42.25 </td></tr>
</table>
Question:
What event and competition did Dahlia Duhany win in Tokyo, Japan in 1991?
Answer:
Dahlia Duhaney won the world title in the women's 4 x 100 m relay at the 1991 World Championships in Tokyo, Japan.