Explanation for binary files inside source package according to
  http://lists.debian.org/debian-devel/2013/09/msg00332.html

Files: data/friendship.RData
Documented: man/friendship.Rd
  Simulated Example of Schoolchildren Friendship Network

Files: data/seatshare.rda
Documented: man/seatshare.Rd
  Left Party Seat Share in 11 OECD Countries

Files: data/sna.ex.RData
Documented: man/sna.ex.Rd
  Simulated Example of Social Network Data

 -- Andreas Tille <tille@debian.org>  Sun, 22 Oct 2017 22:45:06 +0200
