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:
Lee Kyu-han
Table title:
Television series
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 > Network </th></tr>
<tr> <td colspan=1 rowspan=1 > 1998 </td><td colspan=1 rowspan=1 > Love and Success </td><td colspan=1 rowspan=1 > Kim Myung-soo </td><td colspan=1 rowspan=1 > MBC </td></tr>
<tr> <td colspan=1 rowspan=3 > 1999 </td><td colspan=1 rowspan=1 > Youth </td><td colspan=1 rowspan=1 > Soo-hyeon </td><td colspan=1 rowspan=3 > SBS </td></tr>
<tr> <td colspan=1 rowspan=1 > March </td><td colspan=1 rowspan=1 > Kyu-han </td></tr>
<tr> <td colspan=1 rowspan=1 > KAIST </td><td colspan=1 rowspan=1 > Computer Science graduate student </td></tr>
<tr> <td colspan=1 rowspan=1 > 2000 </td><td colspan=1 rowspan=1 > Some Like It Hot </td><td colspan=1 rowspan=1 > Kang Cheol-ho </td><td colspan=1 rowspan=2 > MBC </td></tr>
<tr> <td colspan=1 rowspan=2 > 2005 </td><td colspan=1 rowspan=1 > My Lovely Sam Soon </td><td colspan=1 rowspan=1 > Min Hyun-woo </td></tr>
<tr> <td colspan=1 rowspan=1 > Love Needs a Miracle </td><td colspan=1 rowspan=1 > Jin Jung-pyo </td><td colspan=1 rowspan=1 > SBS </td></tr>
<tr> <td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > Que Sera, Sera </td><td colspan=1 rowspan=1 > Shin Joon-hyuk </td><td colspan=1 rowspan=2 > MBC </td></tr>
<tr> <td colspan=1 rowspan=2 > 2009 </td><td colspan=1 rowspan=1 > Soul </td><td colspan=1 rowspan=1 > Seo Joon-hee </td></tr>
<tr> <td colspan=1 rowspan=1 > Smile, You </td><td colspan=1 rowspan=1 > Lee Han-se </td><td colspan=1 rowspan=1 > SBS </td></tr>
<tr> <td colspan=1 rowspan=2 > 2010 </td><td colspan=1 rowspan=1 > More Charming by the Day </td><td colspan=1 rowspan=1 > Lee Kyu-han </td><td colspan=1 rowspan=1 > MBC </td></tr>
<tr> <td colspan=1 rowspan=1 > Drama Special "Snail Dormitory" </td><td colspan=1 rowspan=1 > Bang Joon-seong </td><td colspan=1 rowspan=1 > KBS2 </td></tr>
<tr> <td colspan=1 rowspan=2 > 2011 </td><td colspan=1 rowspan=1 > Listen to My Heart </td><td colspan=1 rowspan=1 > Lee Seung-chul </td><td colspan=1 rowspan=1 > MBC </td></tr>
<tr> <td colspan=1 rowspan=1 > If Tomorrow Comes </td><td colspan=1 rowspan=1 > Lee Il-bong </td><td colspan=1 rowspan=1 > SBS </td></tr>
<tr> <td colspan=1 rowspan=2 > 2012 </td><td colspan=1 rowspan=1 > Wedding Scheme </td><td colspan=1 rowspan=1 > Lee Kang-jae </td><td colspan=1 rowspan=1 > tvN </td></tr>
<tr> <td colspan=1 rowspan=1 > The Birth of a Family </td><td colspan=1 rowspan=1 > Kang Yoon-jae </td><td colspan=1 rowspan=2 > SBS </td></tr>
<tr> <td colspan=1 rowspan=1 > 2014 </td><td colspan=1 rowspan=1 > Only Love </td><td colspan=1 rowspan=1 > Choi Jae-min </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 2015 </td><td colspan=1 rowspan=1 > The Big Dipper </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Naver </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > I Have a Lover </td><td class="highlighted"  colspan=1 rowspan=1 > Baek Seok </td><td colspan=1 rowspan=1 > SBS </td></tr>
<tr> <td colspan=1 rowspan=1 > 2017 </td><td colspan=1 rowspan=1 > Introvert Boss </td><td colspan=1 rowspan=1 > Reporter Woo </td><td colspan=1 rowspan=1 > tvN </td></tr>
<tr> <td colspan=1 rowspan=2 > 2018 </td><td colspan=1 rowspan=1 > Rich Family's Son </td><td colspan=1 rowspan=1 > Nam Tae-il </td><td colspan=1 rowspan=1 > MBC </td></tr>
<tr> <td colspan=1 rowspan=1 > The Dramatization Has Already Begun </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=2 > tvN </td></tr>
<tr> <td colspan=1 rowspan=1 > 2019 </td><td colspan=1 rowspan=1 > The Crowned Clown </td><td colspan=1 rowspan=1 > Joo Ho-geol </td></tr>
</table>
Question:
What role and series was Lee Kyu-han known for in 2015 a SBS network show?
Answer:
Lee Kyu-han was known for his role as Baek Seok in the 2015 series I Have a Lover.