/usr/lib/libCEGUIExpatParser.so is in libcegui-mk2-dev 0.7.6-2ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libCEGUIExpatParser-0.7.6.so
/usr/lib/libCEGUIExpatParser-0.7.6.so