digraph structs {
    node [shape=plaintext];

    struct1 [label=<<TABLE>
	<TR>
	    <TD>line 1</TD>
	    <TD BGCOLOR="blue"><FONT COLOR="white">line2</FONT></TD>
	    <TD BGCOLOR="gray"><FONT POINT-SIZE="24.0">line3</FONT></TD>
	    <TD BGCOLOR="yellow"><FONT POINT-SIZE="24.0" FACE="playbill">line4</FONT></TD>
	    <TD>
	      <TABLE CELLPADDING="0" BORDER="0" CELLSPACING="0">
          <TR>
            <TD><FONT COLOR="green">Mixed</FONT></TD>
            <TD><FONT COLOR="red">fonts</FONT></TD>
          </TR>
	      </TABLE>
        </TD>
	</TR>
    </TABLE>>];
}