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:
Athletics at the 2008 Summer Olympics – Women's 400 metres
Table title:
Final
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Rank </th><th colspan=1 rowspan=1 > Lane </th><th colspan=1 rowspan=1 > Name </th><th colspan=1 rowspan=1 > Nationality </th><th colspan=1 rowspan=1 > Time </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 4 </td><td class="highlighted"  colspan=1 rowspan=1 > Ohuruogu, ChristineChristine Ohuruogu </td><td class="highlighted"  colspan=1 rowspan=1 > Great Britain </td><td class="highlighted"  colspan=1 rowspan=1 > 49.62 </td><td colspan=1 rowspan=1 > WL </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 6 </td><td class="highlighted"  colspan=1 rowspan=1 > Williams, SherickaShericka Williams </td><td colspan=1 rowspan=1 > Jamaica </td><td class="highlighted"  colspan=1 rowspan=1 > 49.69 </td><td colspan=1 rowspan=1 > PB </td></tr>
<tr> <td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 7 </td><td colspan=1 rowspan=1 > Richards, SanyaSanya Richards </td><td colspan=1 rowspan=1 > United States </td><td colspan=1 rowspan=1 > 49.93 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > Gushchina, YuliaYulia Gushchina </td><td colspan=1 rowspan=1 > Russia </td><td colspan=1 rowspan=1 > 50.01 </td><td colspan=1 rowspan=1 > PB </td></tr>
<tr> <td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 2 </td><td colspan=1 rowspan=1 > Whyte, RosemarieRosemarie Whyte </td><td colspan=1 rowspan=1 > Jamaica </td><td colspan=1 rowspan=1 > 50.68 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 6 </td><td colspan=1 rowspan=1 > 8 </td><td colspan=1 rowspan=1 > Montsho, AmantleAmantle Montsho </td><td colspan=1 rowspan=1 > Botswana </td><td colspan=1 rowspan=1 > 51.18 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > DSQ </td><td colspan=1 rowspan=1 > 9 </td><td colspan=1 rowspan=1 > Kapachinskaya, AnastasiaAnastasia Kapachinskaya </td><td colspan=1 rowspan=1 > Russia </td><td colspan=1 rowspan=1 > 50.03 </td><td colspan=1 rowspan=1 > PB </td></tr>
<tr> <td colspan=1 rowspan=1 > DSQ </td><td colspan=1 rowspan=1 > 3 </td><td colspan=1 rowspan=1 > Firova, TatianaTatiana Firova </td><td colspan=1 rowspan=1 > Russia </td><td colspan=1 rowspan=1 > 50.11 </td><td colspan=1 rowspan=1 > SB </td></tr>
</table>
Question:
Who were the first and second place finishers, and how much did first win by?
Answer:
Christine Ohuruogu ran in 49.62 seconds, just pipping Shericka Williams by 0.07 seconds in 2008 Summer Olympics – Women's 400 metres.