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:
List of concert halls
Table title:
Croatia
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Location </th><th colspan=1 rowspan=1 > Venue </th><th colspan=1 rowspan=1 > Room </th><th colspan=1 rowspan=1 > Date built </th><th colspan=1 rowspan=1 > Seats </th><th colspan=1 rowspan=1 > Resident organizations </th></tr>
<tr> <td colspan=1 rowspan=2 > Zagreb </td><td class="highlighted"  colspan=1 rowspan=2 > Vatroslav Lisinski Concert Hall </td><td colspan=1 rowspan=1 > Great Hall </td><td class="highlighted"  colspan=1 rowspan=1 > 1973 </td><td colspan=1 rowspan=1 > 1,847 </td><td colspan=1 rowspan=1 > Zagreb Philharmonic Orchestra </td></tr>
<tr> <td colspan=1 rowspan=1 > Small Hall </td><td class="highlighted"  colspan=1 rowspan=1 > 1973 </td><td colspan=1 rowspan=1 > 304 </td><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
What is the connection between Vatroslav Lisinski and 1973?
Answer:
The concert hall named "Vatroslav Lisinski" was built in 1973.