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:
Julia Bradbury
Table title:
Filmography
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 > Channel </th><th colspan=1 rowspan=1 > Role </th></tr>
<tr> <td colspan=1 rowspan=1 > 1997–? </td><td colspan=1 rowspan=1 > Exclusive </td><td colspan=1 rowspan=1 > Five </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > 2005–2009 </td><td colspan=1 rowspan=1 > Watchdog </td><td colspan=1 rowspan=1 > BBC One </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > 2006 </td><td colspan=1 rowspan=1 > Are We Being Served? </td><td colspan=1 rowspan=1 > BBC </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > Wainwright Walks </td><td colspan=1 rowspan=1 > BBC Four </td><td colspan=1 rowspan=1 > Presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > 2008–2011 </td><td colspan=1 rowspan=1 > Kill It, Cook It, Eat It </td><td colspan=1 rowspan=1 > BBC Three </td><td colspan=1 rowspan=1 > Presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > 2009–2014 </td><td colspan=1 rowspan=1 > Countryfile </td><td class="highlighted"  colspan=1 rowspan=5 > BBC One </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > 2010 </td><td colspan=1 rowspan=1 > Railway Walks With Julia Bradbury </td><td colspan=1 rowspan=1 > Presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > 2011 </td><td colspan=1 rowspan=1 > That's Britain! </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 2012 </td><td colspan=1 rowspan=1 > The Great British Countryside </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Planet Earth Live </td><td class="highlighted"  colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=5 > 2013 </td><td colspan=1 rowspan=1 > Take On the Twisters </td><td colspan=1 rowspan=2 > ITV </td><td colspan=1 rowspan=1 > Presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > Mystery Map </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > Fightback Britain </td><td colspan=1 rowspan=3 > BBC One </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > The One Show </td><td colspan=1 rowspan=1 > Stand-in presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > Keeping Britain Safe 24/7 </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > 2015 </td><td colspan=1 rowspan=1 > The Wonder of Britain </td><td colspan=1 rowspan=2 > ITV </td><td colspan=1 rowspan=1 > Presenter </td></tr>
<tr> <td colspan=1 rowspan=2 > 2016 </td><td colspan=1 rowspan=1 > Best Walks with a View with Julia Bradbury </td><td colspan=1 rowspan=1 > Presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > Famous, Rich and Homeless </td><td colspan=1 rowspan=1 > BBC One </td><td colspan=1 rowspan=1 > Participant </td></tr>
<tr> <td colspan=1 rowspan=1 > 2017 </td><td colspan=1 rowspan=1 > Britain's Best Walks with Julia Bradbury </td><td colspan=1 rowspan=3 > ITV </td><td colspan=1 rowspan=1 > Presenter </td></tr>
<tr> <td colspan=1 rowspan=2 > 2018 </td><td colspan=1 rowspan=1 > Britain's Favourite Walks: Top 100 </td><td colspan=1 rowspan=1 > Co-presenter </td></tr>
<tr> <td colspan=1 rowspan=1 > My £10K Holiday Home </td><td colspan=1 rowspan=1 > Presenter </td></tr>
</table>
Question:
What role did Julia Bradbury play in BBC One's Planet Earth Live in 2012?
Answer:
Julia Bradbury co-presented a programme called Planet Earth Live in 2012, which aired on BBC One.