Group radiobutton options in one fieldset

Hi, I use contactform7 for a website I am working on.

[radio your-course id:radio-course use_label_element default:0
“Option 1”
“Option 2”
“Option 3″
]

I would like to divide this radiobutton group into subgroups. Would that be possible?
In html code, it would be like this:

<h3>Title group 1</h3>
<input type=”radio” name=”your-cursus” value=”option 1a”>
<input type=”radio” name=”your-cursus” value=”option 1b”>
<input type=”radio” name=”your-cursus” value=”option 1c”>
<h3>Title group 2</h3>
<input type=”radio” name=”your-cursus” value=”option 2a”>
<input type=”radio” name=”your-cursus” value=”option 2b”>
<input type=”radio” name=”your-cursus” value=”option 2c”>
<h3>Title group 3</h3>
<input type=”radio” name=”your-cursus” value=”option 3a”>
<input type=”radio” name=”your-cursus” value=”option 3b”>
<input type=”radio” name=”your-cursus” value=”option 3c”>

Is there a way to do some hardcoding in the Contactform7 to direct this?
Thanks a lot in advance!
Best regards, MP