/usr/ is in libqwt-qt5-dev 6.1.3-1.
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/usr/share/doc/libqwt-qt5-dev/
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/qwt.prf
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/qwtconfig.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/qwtfunctions.pri
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/features/qwtmathml.prf
/usr/lib/x86_64-linux-gnu/qt5/plugins/
/usr/lib/x86_64-linux-gnu/qt5/plugins/designer/
/usr/lib/x86_64-linux-gnu/qt5/plugins/designer/libqwt_designer_plugin.so
/usr/share/
/usr/share/doc/
/usr/share/doc/libqwt-qt5-dev/copyright
/usr/lib/libqwt-qt5.so
/usr/share/doc/libqwt-qt5-dev/changelog.Debian.gz