Nodes labels on two lines

Hi,

Is it possible to insert a line break within a node label?

I tried to do that directly in the gexf file with <br>, <br />, or \n. But it didn't work.
For example, in the miserables.gexf file:

<nodes>
      <node id="0.0" label="Myriel<br>SomeText">

Also tried to do that in the js code but without success (I'm new to js).

Any idea?
Thank you.