Why are there openoffice.org updates in Natty?

[ssc1478]

The selected updates include a lot of openoffice.org packages.  I have
libreoffice installed which is the default in Natty.  I didn't install
openoffice.

These are all updates so I guess something is using them.  They don't
show up in the dash menu.

>From my terminal:
The following packages will be upgraded:
  app-install-data language-selector language-selector-common
  language-selector-gnome openoffice.org-calc openoffice.org-common
  openoffice.org-draw openoffice.org-emailmerge openoffice.org-gnome
  openoffice.org-gtk openoffice.org-help-en-gb openoffice.org-help-en-us
  openoffice.org-hyphenation-en-us openoffice.org-impress
  openoffice.org-l10n-en-za openoffice.org-math openoffice.org-thesaurus-en-us
  openoffice.org-writer


How can I tell which application is using these?  Why isn't
Libreoffice being used?

Phil