XML parsing issue with '&' in element text

I have the following code:

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(inputXml)));

And the parse step is throwning:

SAXParseException: The entity name must immediately follow 
                   the '&' in the entity reference

due to the following '&' in my inputXml:

<Line1>Day & Night</Line1>

I'm not in control of in the inbound XML. How can I safely/correctly parse this?