/usr/share/doc/imagemagick-6.q16hdri/NEWS.Debian.gz is in imagemagick-6.q16hdri 8:6.9.7.4+dfsg-16ubuntu6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/imagemagick-6.q16hdri/../libmagickcore-6.q16hdri-3/NEWS.Debian.gz