/usr/ is in libregex-clojure 0.0~git20130321.1.433265f-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/maven-repo/net/
/usr/share/maven-repo/net/cgrand/
/usr/share/
/usr/share/doc-base/
/usr/share/doc-base/regex-clojure-syntax
/usr/share/doc/
/usr/share/doc/libregex-clojure/
/usr/share/doc/libregex-clojure/syntax.html
/usr/share/doc/libregex-clojure/copyright
/usr/share/doc/libregex-clojure/changelog.Debian.gz
/usr/share/java/
/usr/share/java/regex-0.0~git20130321.1.433265f.jar
/usr/share/maven-repo/
/usr/share/maven-repo/net/cgrand/regex/
/usr/share/maven-repo/net/cgrand/regex/1.1.0/
/usr/share/maven-repo/net/cgrand/regex/1.1.0/regex-1.1.0.pom
/usr/share/maven-repo/net/cgrand/regex/debian/
/usr/share/maven-repo/net/cgrand/regex/debian/regex-debian.pom
/usr/share/java/regex.jar
/usr/share/maven-repo/net/cgrand/regex/1.1.0/regex-1.1.0.jar
/usr/share/maven-repo/net/cgrand/regex/debian/regex-debian.jar