g term that represents
                            the goal that will be evaluated.
                                This term must be a
                            <code>PLStructure</code> object or a 
                            <code>PLAtom</code> object.
<DT><B>Throws:</B>
<DD><CODE><code>PLException</code></CODE> - if there is no
                    connection to Prolog.
<DD><CODE>java.io.IOException</CODE>
<DD><CODE><A HREF="../CiaoJava/PLException.html" title="class in CiaoJava">PLException</A></CODE>