markdown - how to start a new row and center the whole text?

I use a markdown for a box in which the client is expressing herself with short words. there is the headline (already in the box) which says "Irene in Kurzfassung". After that I want to start a new row and there will be now only short words that follow. Maybe a little more space in between the first row and the rest (to pick out the headline better), but not necessarily.  This is my first question: What do I have to fill in the markdown below to jump into the next row?

And then I want to center the whole text, headline as well as the words below in the middle of the box. 

Can anybody help me please? 

Here is the markdown:

<table style="width:100%">
  <tr>
    <th>IRENE in *Kurzfassung*</th>
   
  </tr>
  <tr>
    
</table>

<style>
  table, th, td {
  border: 1px solid black;
  border-collapse: collapse;
}
th, td {
  padding: 15px;
  text-align: left;
}
table#t01 {
  width: 100%;    
  background-color: #f1f1c1;
}
</style>

AND: is it possible to have the corners of the box round instead of angular? 😁

Hi Hanna,
Please add the code into your page and let me know the URL of that.

Please use the like button if it helps you!

Best,
Leopold