That character is 0x92, UTF-8 only maps up to 0x7F as a single byte. If the document is representing that character with just one byte then its not UTF-8 and a broken XML instance. That character is represented with 2 bytes in UTF-8.

Whenever I get confused about UTF-8 I use this reference;

http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8