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:
Italian Superturismo Championship
Table title:
Champions
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Series Name </th><th colspan=1 rowspan=1 > Season </th><th colspan=1 rowspan=1 > Champion </th><th colspan=1 rowspan=1 > Team Champion </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=13 > Italian Superturismo Championship </td><th colspan=1 rowspan=1 > 1987 </th><td colspan=1 rowspan=1 > Italy Michele Di Gioia (BMW M3) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 1988 </th><td colspan=1 rowspan=1 > Italy Gianfranco Brancatelli (Alfa Romeo 75 Turbo) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 1989 </th><td colspan=1 rowspan=1 > Venezuela Johnny Cecotto (BMW M3) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 1990 </th><td colspan=1 rowspan=1 > Italy Roberto Ravaglia (BMW M3) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 1991 </th><td colspan=1 rowspan=1 > Italy Roberto Ravaglia (BMW M3) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 1992 </th><td colspan=1 rowspan=1 > Italy Nicola Larini (Alfa Romeo 155 GTA) </td><td colspan=1 rowspan=1 > Italy Alfa Corse </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 1993 </th><td class="highlighted"  colspan=1 rowspan=1 > Italy Roberto Ravaglia (BMW 318i) </td><td colspan=1 rowspan=1 > Italy CiBiEmme Engineering </td></tr>
<tr> <th colspan=1 rowspan=1 > 1994 </th><td colspan=1 rowspan=1 > Italy Emanuele Pirro (Audi 80 Quattro) </td><td colspan=1 rowspan=1 > Italy Audi Sport Italia </td></tr>
<tr> <th colspan=1 rowspan=1 > 1995 </th><td colspan=1 rowspan=1 > Italy Emanuele Pirro (Audi A4 Quattro) </td><td colspan=1 rowspan=1 > Italy Audi Sport Italia </td></tr>
<tr> <th colspan=1 rowspan=1 > 1996 </th><td colspan=1 rowspan=1 > Italy Rinaldo Capello (Audi A4 Quattro) </td><td colspan=1 rowspan=1 > Italy CiBiEmme Engineering </td></tr>
<tr> <th colspan=1 rowspan=1 > 1997 </th><td colspan=1 rowspan=1 > Italy Emanuele Naspetti (BMW 320i) </td><td colspan=1 rowspan=1 > Italy CiBiEmme Engineering </td></tr>
<tr> <th colspan=1 rowspan=1 > 1998 </th><td colspan=1 rowspan=1 > Italy Fabrizio Giovanardi (Alfa Romeo 156) </td><td colspan=1 rowspan=1 > Italy Nordauto Engineering </td></tr>
<tr> <th colspan=1 rowspan=1 > 1999 </th><td colspan=1 rowspan=1 > Italy Fabrizio Giovanardi (Alfa Romeo 156) </td><td colspan=1 rowspan=1 > Italy Nordauto Engineering </td></tr>
<tr> <td colspan=1 rowspan=3 > Italian Super Production Championship </td><th colspan=1 rowspan=1 > 2002 </th><td colspan=1 rowspan=1 > Italy Massimo Pigoli (BMW 320i) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2003 </th><td colspan=1 rowspan=1 > Italy Salvatore Tavano (Alfa Romeo 147) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2004 </th><td colspan=1 rowspan=1 > Italy Adriano de Micheli (Alfa Romeo 147) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <td colspan=1 rowspan=2 > Italian Superturismo Championship </td><th colspan=1 rowspan=1 > 2005 </th><td colspan=1 rowspan=1 > Italy Alessandro Zanardi (BMW 320i) </td><td colspan=1 rowspan=1 > Italy ROAL Motorsport </td></tr>
<tr> <th colspan=1 rowspan=1 > 2006 </th><td colspan=1 rowspan=1 > Italy Roberto Colciago (SEAT León) </td><td colspan=1 rowspan=1 > Italy SEAT Sport Italia </td></tr>
<tr> <td colspan=1 rowspan=2 > Italian Touring Car Competition </td><th colspan=1 rowspan=1 > 2007 </th><td colspan=1 rowspan=1 > Italy Cesare Cremonesi (BMW 320i) </td><td colspan=1 rowspan=1 > Italy Arsenio Corse </td></tr>
<tr> <th colspan=1 rowspan=2 > 2008 </th><td colspan=1 rowspan=1 > Italy Massimo Arduini (Honda Accord) </td><td colspan=1 rowspan=1 > Italy Team Mercury GPS </td></tr>
<tr> <td colspan=1 rowspan=8 > Campionato Italiano Turismo Endurance </td><td colspan=1 rowspan=1 > Italy Luca Cappellari (BMW M3 E92) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2009 </th><td colspan=1 rowspan=1 > Italy Roberto Colciago (SEAT León Supercopa) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2010 </th><td colspan=1 rowspan=1 > San Marino Paolo Meloni (BMW M3 E92) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2011 </th><td colspan=1 rowspan=1 > Italy Piero Necchi (BMW M3 E92) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2012 </th><td colspan=1 rowspan=1 > Italy Andrea Bacci (BMW M3 E92) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2013 </th><td colspan=1 rowspan=1 > Italy Giancarlo Busnelli (SEAT León Cupra) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2014 </th><td colspan=1 rowspan=1 > San Marino Paolo Meloni Italy Massimiliano Tresoldi (BMW M3 E92) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <th colspan=1 rowspan=1 > 2015 </th><td colspan=1 rowspan=1 > Italy Valentina Albanese (SEAT León Cup Racer) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <td colspan=1 rowspan=1 > Italian Touring Car Championship </td><th colspan=1 rowspan=1 > 2016 </th><td colspan=1 rowspan=1 > Italy Roberto Colciago (Honda Civic TCR) </td><td colspan=1 rowspan=1 > none </td></tr>
<tr> <td colspan=1 rowspan=1 > TCR Italian Touring Car Championship </td><th colspan=1 rowspan=1 > 2017 </th><td colspan=1 rowspan=1 > Italy Nicola Baldan (SEAT León TCR) </td><td colspan=1 rowspan=1 > none </td></tr>
</table>
Question:
Who is the champion of the 1993 Italian Superturismo Championship?
Answer:
The 1993 season of the Italian Superturismo Championship was won by Ravaglia in a BMW 318i.