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:
Crystal Palace transmitting station
Table title:
Analogue radio (AM medium wave)
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Frequency </th><th colspan=1 rowspan=1 > kW </th><th colspan=1 rowspan=1 > Service </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 558 kHz </td><td colspan=1 rowspan=1 > 1 </td><td class="highlighted"  colspan=1 rowspan=1 > Spectrum </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 720 kHz </td><td colspan=1 rowspan=1 > 0.75 </td><td class="highlighted"  colspan=1 rowspan=1 > BBC Radio 4 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1035 kHz </td><td colspan=1 rowspan=1 > 2.5 </td><td colspan=1 rowspan=1 > Lyca Dil Se </td></tr>
</table>
Question:
What are the transmission frequencies of the Crystal Palace transmitting station?
Answer:
The Crystal Palace transmitting station has medium wave transmitters on 558 kHz (Spectrum), 720 kHz (BBC Radio 4) and 1035 kHz.