/usr/share/doc/account-plugin-yahoojp/AUTHORS is in account-plugin-yahoojp 3.8.6-0ubuntu9.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/account-plugin-yahoojp/../empathy/AUTHORS
/usr/share/doc/account-plugin-yahoojp/../empathy/AUTHORS