digraph html {
  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>>];
}