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:
Jessica Phillips (actress)
Table title:
Theatre credits
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 > Theatre </th><th colspan=1 rowspan=1 > Director(s) </th><th colspan=1 rowspan=1 > Ref. </th></tr>
<tr> <td colspan=1 rowspan=1 > 1998–99 </td><td colspan=1 rowspan=2 > The Scarlet Pimpernel </td><td colspan=1 rowspan=2 > Ensemble (replacement) </td><td colspan=1 rowspan=1 > Minskoff Theatre </td><td colspan=1 rowspan=2 > Peter H. Hunt </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1999–00 </td><td colspan=1 rowspan=1 > Neil Simon Theatre </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009–10 </td><td colspan=1 rowspan=1 > Next to Normal </td><td colspan=1 rowspan=1 > Diana (understudy) </td><td colspan=1 rowspan=1 > Booth Theatre </td><td colspan=1 rowspan=1 > Michael Greif </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011–12 </td><td colspan=1 rowspan=1 > Priscilla, Queen of the Desert </td><td colspan=1 rowspan=1 > Marion </td><td colspan=1 rowspan=1 > Palace Theatre </td><td colspan=1 rowspan=1 > Simon Phillips </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012 </td><td colspan=1 rowspan=1 > Leap of Faith </td><td colspan=1 rowspan=1 > Marla McGowan </td><td colspan=1 rowspan=1 > St. James Theatre </td><td colspan=1 rowspan=1 > Christopher Ashley </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 > Unknown Soldier </td><td class="highlighted"  colspan=1 rowspan=1 > Ellen </td><td class="highlighted"  colspan=1 rowspan=1 > Williamstown Theater Festival </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2017 </td><td class="highlighted"  colspan=1 rowspan=1 > Deathless </td><td class="highlighted"  colspan=1 rowspan=1 > Michele Serling </td><td class="highlighted"  colspan=1 rowspan=1 > Goodspeed Musicals </td><td colspan=1 rowspan=1 > Tina Landau </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 2018 </td><td colspan=1 rowspan=1 > Dear Evan Hansen </td><td colspan=1 rowspan=1 > Heidi Hansen </td><td colspan=1 rowspan=1 > U.S. National Tour </td><td colspan=1 rowspan=1 > Michael Greif </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What roles did Jessica Phillips star in from 2015-2017?
Answer:
Jessica Phillips starred as Ellen in Unknown Soldier at the Williamstown Theater Festival in 2015 and as Michele Serling in Deathless at Goodspeed Musicals in 2017.