/usr/share/pyshared/zope.app.applicationcontrol-3.5.10.egg-info/namespace_packages.txt is in python-zope.app.applicationcontrol 3.5.10-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | zope
zope.app
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