/usr/ is in lib4store-dev 1.1.6+20151109-2build1.
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..
/usr/include/
/usr/include/4store/
/usr/include/4store/4s-datatypes.h
/usr/include/4store/4s-hash.h
/usr/include/4store/4store.h
/usr/lib/
/usr/lib/lib4store.a
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/4store-0.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/lib4store-dev/
/usr/share/doc/lib4store-dev/copyright
/usr/lib/lib4store.so
/usr/share/doc/lib4store-dev/INSTALL
/usr/share/doc/lib4store-dev/changelog.Debian.gz
/usr/share/doc/lib4store-dev/glossary
/usr/share/doc/lib4store-dev/protocol.gz
/usr/share/doc/lib4store-dev/release
/usr/share/doc/lib4store-dev/wire-format.gz