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:
Katherine Parkinson
Table title:
Stage
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></tr>
<tr> <td colspan=1 rowspan=1 > 2018 </td><td colspan=1 rowspan=1 > Home, I'm Darling </td><td colspan=1 rowspan=1 > Judy </td><td colspan=1 rowspan=1 > Theatr Clwyd and Royal National Theatre Co-Production Nominated - Olivier Award for Best Actress </td></tr>
<tr> <td colspan=1 rowspan=1 > 2016 </td><td colspan=1 rowspan=1 > Dead Funny </td><td colspan=1 rowspan=1 > Eleanor </td><td colspan=1 rowspan=1 > Vaudeville Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2013 </td><td colspan=1 rowspan=1 > Before the Party </td><td colspan=1 rowspan=1 > Laura </td><td colspan=1 rowspan=1 > Almeida Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2012 </td><td colspan=1 rowspan=1 > Absent Friends </td><td colspan=1 rowspan=1 > Diana </td><td colspan=1 rowspan=1 > Harold Pinter Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > 66 Books </td><td colspan=1 rowspan=1 > Jo </td><td colspan=1 rowspan=1 > Bush Theatre </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2011 </td><td class="highlighted"  colspan=1 rowspan=1 > The School for Scandal </td><td class="highlighted"  colspan=1 rowspan=1 > Lady Teazle </td><td class="highlighted"  colspan=1 rowspan=1 > Barbican Theatre </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2010 </td><td class="highlighted"  colspan=1 rowspan=1 > Season's Greetings </td><td colspan=1 rowspan=1 > Pattie </td><td class="highlighted"  colspan=1 rowspan=1 > Royal National Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > Cock </td><td colspan=1 rowspan=1 > W </td><td colspan=1 rowspan=1 > Royal Court Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > The Seagull </td><td colspan=1 rowspan=1 > Masha </td><td colspan=1 rowspan=1 > Royal Court Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2006 </td><td colspan=1 rowspan=1 > The Lightning Play </td><td colspan=1 rowspan=1 > Imogen Cumberbatch </td><td colspan=1 rowspan=1 > Almeida Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2006 </td><td colspan=1 rowspan=1 > Other Hands </td><td colspan=1 rowspan=1 > Lydia </td><td colspan=1 rowspan=1 > Soho Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > Flush </td><td colspan=1 rowspan=1 > Lily </td><td colspan=1 rowspan=1 > Soho Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > Cigarettes and Chocolate </td><td colspan=1 rowspan=1 > Gail </td><td colspan=1 rowspan=1 > King's Head Theatre </td></tr>
<tr> <td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > The Unthinkable </td><td colspan=1 rowspan=1 > Fran </td><td colspan=1 rowspan=1 > Sheffield Crucible </td></tr>
<tr> <td colspan=1 rowspan=1 > 2003 </td><td colspan=1 rowspan=1 > The Riot Act </td><td colspan=1 rowspan=1 > Antigone </td><td colspan=1 rowspan=1 > The Gate (London) </td></tr>
<tr> <td colspan=1 rowspan=1 > 2003 </td><td colspan=1 rowspan=1 > The Increased Difficulty of Concentration </td><td colspan=1 rowspan=1 > Anna Balcar </td><td colspan=1 rowspan=1 > The Gate (London) </td></tr>
<tr> <td colspan=1 rowspan=1 > 2003 </td><td colspan=1 rowspan=1 > Camille </td><td colspan=1 rowspan=1 > Olympe </td><td colspan=1 rowspan=1 > Lyric Hammersmith </td></tr>
<tr> <td colspan=1 rowspan=1 > 2002 </td><td colspan=1 rowspan=1 > Deep Throat Live on Stage </td><td colspan=1 rowspan=1 > Linda Lovelace </td><td colspan=1 rowspan=1 > Assembly Rooms Edinburgh Festival Fat Bloke Productions </td></tr>
<tr> <td colspan=1 rowspan=1 > 2002 </td><td colspan=1 rowspan=1 > Frame 312 </td><td colspan=1 rowspan=1 > Maggie / Doris / Marie </td><td colspan=1 rowspan=1 > Donmar Warehouse </td></tr>
<tr> <td colspan=1 rowspan=1 > 2002 </td><td colspan=1 rowspan=1 > The Age of Consent </td><td colspan=1 rowspan=1 > Stephanie </td><td colspan=1 rowspan=1 > Bush Theatre </td></tr>
</table>
Question:
In 2010 Katherine Parkinson appeared in what at the national theatre?
Answer:
In 2010, Katherine Parkinson appeared in Season's Greetings at the National Theatre and in 2011 as Lady Teazle in The School for Scandal at the Barbican Centre.