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I get the following error when I try to run my java program(it's supposed to read an xml file and print out some of the content). From what I understand there is an unreferenced entity which is not part of the xml standard so my question is; how can I fix this problem? Thanks, [Fatal Error] subject.xml:4:233: The entity "rsquo" was referenced, but not declared. org.xml.sax.SAXParseException: The entity "rsquo" was referenced, but not declared. at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source) at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source) at javax.xml.parsers.DocumentBuilder.parse(Unknown Source) at DomParserExample2.parseXmlFile(DomParserExample2.java:42) at DomParserExample2.runExample(DomParserExample2.java:24) at DomParserExample2.main(DomParserExample2.java:115) Exception in thread "main" java.lang.NullPointerException at DomParserExample2.parseDocument(DomParserExample2.java:54) at DomParserExample2.runExample(DomParserExample2.java:27) at DomParserExample2.main(DomParserExample2.java:115)

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