Error: "The markup in the document preceding the root element must be well-formed"
<p>I am getting an error while creating RDF/XML:</p>

<blockquote>
  <p>The markup in the document preceding the root element must be well-formed</p>
</blockquote>

<p>Can somebody please help me with this error?</p>

<pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding ="UTF-8"?&gt;
&lt;"rdf:RDF"&gt;
"xmlns:g=“http://schema.org/gen”
"xmlns:u=“http://schema.org/univ”&gt;
&lt;rdf:Description about="http://thisisjohnsmith.org"&gt;
    &lt;dc:Title&gt; Personal Webpage &lt;/dc:Title&gt;
           &lt;dc:Creator&gt; John Smith &lt;/dc:Creator&gt;
&lt;/rdf:Description&gt;
&lt;rdf:Person rdf:ID=“john”&gt;
    &lt;g:name&gt;John Smith&lt;/g:name&gt; 
    &lt;g:age&gt;40&lt;/g:age&gt;
&lt;/rdf:Person&gt; 
&lt;rdf:Person rdf:ID=“peter”&gt;
    &lt;g:name&gt;Peter&lt;/g:name&gt;
&lt;/rdf:Person&gt; 
 &lt;rdf:Lecturer rdf:ID=“john”&gt;
    &lt;g:name&gt;John Smith&lt;/g:name&gt; 
&lt;/rdf:Lecturer&gt; 
&lt;rdf:Lecture rdf:ID=“john”&gt;
    &lt;g:name&gt;John Smith&lt;/g:name&gt; 
    &lt;g:status&gt;crowded&lt;/g:status&gt; 
    &lt;g:student&gt;
    &lt;g:name&gt; Peter&lt;/g:name&gt;
   &lt;/g:student&gt;
&lt;/rdf:Lecture&gt; 
&lt;/rdf:RDF&gt;
</code></pre>