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:
Seohyun
Table title:
Theater
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Role </th><th colspan=1 rowspan=1 > Notes </th><th colspan=1 rowspan=1 > Ref. </th></tr>
<tr> <td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > Moon Embracing the Sun </td><td colspan=1 rowspan=1 > Heo Yeon-woo </td><td class="highlighted"  colspan=1 rowspan=3 > Lead role </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2015 </td><td class="highlighted"  colspan=1 rowspan=1 > Gone with the Wind </td><td class="highlighted"  colspan=1 rowspan=1 > Scarlett O'Hara </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2016 </td><td colspan=1 rowspan=1 > Mamma Mia! </td><td colspan=1 rowspan=1 > Sophie Sheridan </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
In 2015, what film role was Seohyun cast in?
Answer:
In 2015, Seohyun was cast in the role of Scarlett O'Hara in the Gone with the Wind.