in reply to XML::Parser does not parse the Symbol
What's the error message? Without it I can only guess...
... that maybe the inverted question mark is encoded in extended-ascii (ISO-8859-1). Since you don't specify an encoding in the XML string, it is assumed to be in UTF-8, and you should get an "invalid character" or such error.
If in your real code the string is hard-coded in the program file, then you need to use utf8;.
If you get the data from a file, you need to either add an XML declaration specifying the encoding, pre-process the data to convert it to utf-8 or use the ProtocolEncoding option when you create the XML::Parser object (I would advise against this last solution though, better to keep the info about the encoding of the data with the data than in the code).