sgmls: SGML error at ambig.sgm, line 3 in declaration parameter 4:
       Content model is ambiguous
sgmls: SGML error at ambig.sgm, line 4 in declaration parameter 4:
       Content model is ambiguous
sgmls: SGML error at ambig.sgm, line 6 in declaration parameter 4:
       Content model is ambiguous
sgmls: SGML error at ambig.sgm, line 9 in declaration parameter 4:
       Content model is ambiguous
sgmls: SGML error at ambig.sgm, line 10 in declaration parameter 4:
       Content model is ambiguous
sgmls: SGML error at ambig.sgm, line 12 in declaration parameter 4:
       Content model is ambiguous
sgmls: SGML error at ambig.sgm, line 13 in declaration parameter 4:
       Content model is ambiguous
sgmls: SGML error at ambig.sgm, line 14 in declaration parameter 4:
       Content model is ambiguous
sgmls: SGML error at ambig.sgm, line 15 in declaration parameter 4:
       Content model is ambiguous
