/usr/lib/x86_64-linux-gnu/libsfml-window.so.2.3 is in libsfml-window2.3v5 2.3.2+dfsg-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libsfml-window.so.2.3.2
/usr/lib/x86_64-linux-gnu/libsfml-window.so.2.3.2