/usr/lib/x86_64-linux-gnu/libclucene-shared.so.1 is in libclucene-core1v5 2.3.3.4-4.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libclucene-shared.so.2.3.3.4
/usr/lib/x86_64-linux-gnu/libclucene-shared.so.2.3.3.4