XML-The markup in the document following the root element must be well-formed

I just began to learn XML and I can't find the solution to my error. I get this error: "The markup in the document following the root element must be well-formed.

Any help would be great. Thanks

    <?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://ift.tt/tphNwY">
    <xsd:element name="inventory">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="cd" type="cdType"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>

    <xsd:complexType name="cdType">
            <xsd:sequence>    
                <xsd:element name="title" type="xsd:string"/>
                <xsd:element name="artist" type="xsd:string"/>
                <xsd:element name="contact" type="xsd:string" minOccurs="0" maxOccurs="1"/>
            </xsd:sequence>
    </xsd:complexType>
</xsd:schema>

<inventory>
  <cd>
    <title>American Beauty</title>
    <artist>Grateful Dead</artist>
    <contact>KC Daily</contact>
  </cd>

  <cd>
     <title>Dare to be Stupid</title>
     <artist>Al Yankovic</artist>
  </cd>

  <cd>
     <title>Skeletons from the Closet</title>
     <artist>Grateful Dead></artist>
     <contact>KC Daily</contact>
  </cd>
</inventory>