[GFSD] package p7zip-full suggests non-free software

Which part is the non-free software?

Package: p7zip-full
Source: p7zip
Version: 9.20.1~dfsg.1-4+6.0trisquel1
Architecture: amd64
Maintainer: Trisquel GNU/Linux developers <name at domain>
Installed-Size: 3843
Depends: libc6 (>= 2.14), libgcc1 (>= 1:4.1.1), libstdc++6 (>= 4.1.1)
Conflicts: p7zip (<< 4.39-1)
Replaces: p7zip (<< 4.39-1)
Homepage: http://p7zip.sourceforge.net/
Priority: optional
Section: utils
Filename: pool/main/p/p7zip/p7zip-full_9.20.1~dfsg.1-4+6.0trisquel1_amd64.deb
Size: 1573540
SHA256: f0973dc9aee6b9b86e5a2f83855cf821292740b2783e2c55995dfb8a6885fc94
SHA1: aac9c47c4500ac55cb08b33e6ae7c779b457ee52
MD5sum: 5f6573ee2571b9f1f6fbef95ccac37c1
Description-en: 7z and 7za file archivers with high compression ratio
p7zip is the Unix command-line port of 7-Zip, a file archiver that
archives with high compression ratios.
.
p7zip-full provides utilities to pack and unpack 7z archives within
a shell or using a GUI (such as Ark, File Roller or Nautilus).
.
Installing p7zip-full allows File Roller to use the very efficient 7z
compression format for packing and unpacking files and directories.
Additionally, it provides the 7z and 7za commands.
.
List of supported formats:
- Packing / unpacking: 7z, ZIP, GZIP, BZIP2, XZ and TAR
- Unpacking only: APM, ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT,
HFS, ISO, LZH, LZMA, LZMA2, MBR, MSI, MSLZ, NSIS, NTFS, RAR (only
if non-free p7zip-rar package is installed), RPM, SquashFS, UDF,
VHD, WIM, XAR and Z.
.
p7zip provides 7zr, a light version of 7za, and p7zip, a gzip-like
wrapper around 7zr.

"only if non-free p7zip-rar package is installed"

ah, sorry didn't notice.

It's OK, I probably should've mentioned it in the very first post.