/usr/share/ada/ is in libxmlada-input7-dev 17.1.2017-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ada/adainclude/
/usr/share/ada/adainclude/xmlada_input/
/usr/share/ada/adainclude/xmlada_input/input_sources-file.adb
/usr/share/ada/adainclude/xmlada_input/input_sources-file.ads
/usr/share/ada/adainclude/xmlada_input/input_sources-http.adb
/usr/share/ada/adainclude/xmlada_input/input_sources-http.ads
/usr/share/ada/adainclude/xmlada_input/input_sources-socket.adb
/usr/share/ada/adainclude/xmlada_input/input_sources-socket.ads
/usr/share/ada/adainclude/xmlada_input/input_sources-strings.adb
/usr/share/ada/adainclude/xmlada_input/input_sources-strings.ads
/usr/share/ada/adainclude/xmlada_input/input_sources.adb
/usr/share/ada/adainclude/xmlada_input/input_sources.ads