/usr/share/doc/libvibrant6b/changelog.Debian.gz is in libvibrant6b 6.1.20170106-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/libvibrant6b/../libncbi6/changelog.Debian.gz
/usr/share/doc/libvibrant6b/../libncbi6/changelog.Debian.gz