digraph G {
  abc [shape=none, margin=0, label=<
<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
  <TR><TD ROWSPAN="3"><FONT COLOR="red">hello</FONT><BR/>world</TD>
      <TD COLSPAN="3">b</TD>
      <TD ROWSPAN="3" BGCOLOR="lightgrey">g</TD>
      <TD ROWSPAN="3">h</TD>
  </TR>
  <TR><TD>c</TD>
      <TD PORT="here">d</TD>
      <TD>e</TD>
  </TR>
  <TR><TD COLSPAN="3">f</TD>
  </TR> 
</TABLE>>]; 
}
