Unpacking libreoffice-l10n-en-gb (from .../libreoffice-l10n-en-gb_1%3a3.4.3-1ubuntu1_all.deb) ...
Selecting previously deselected package libreoffice-help-en-gb.
Unpacking libreoffice-help-en-gb (from .../libreoffice-help-en-gb_1%3a3.4.3-1ubuntu1_all.deb) ...
Selecting previously deselected package libreoffice-l10n-en-za.
Unpacking libreoffice-l10n-en-za (from .../libreoffice-l10n-en-za_1%3a3.4.3-1ubuntu1_all.deb) ...
Selecting previously deselected package mythes-it.
Unpacking mythes-it (from .../mythes-it_2.0.7.gh.deb1-3_all.deb) ...
dpkg: error processing /var/cache/apt/archives/mythes-it_2.0.7.gh.deb1-3_all.deb (--unpack):
 trying to overwrite '/usr/share/mythes/th_it_IT_v2.dat', which is also in package openoffice.org-thesaurus-it 2.0.7.gh.deb1-1.1ubuntu2