nautilus-dbg 1:3.18.4.is.3.14.3-0ubuntu6 (s390x binary) in ubuntu xenial

 Nautilus is the official file manager for the GNOME desktop. It allows
 one to browse directories, preview files and launch applications
 associated with them. It is also responsible for handling the icons on
 the GNOME desktop. It works on local and remote filesystems.
 .
 Several icon themes and components for viewing different kinds of files
 are available in separate packages.
 .
 This development package contains unstripped binaries compiled with
 debugging symbols needed by gdb.