I think the translation is incorrect. It should be "Great Britain does not contain Ireland as well." I suppose you can say "Great Britain does not also contain Ireland." The translation, as given, is however wrong.
It sounds better in English to say 'Ireland is not part of Great Britain', but we're translating to help us learn better Romanian I guess.
For some reason the Romanian in particular has really bad English translations (in terms of grammar). Would love to see this improved!
Duolingo needs to do some checking on its English translations. This one is embarrassingly bad.
grammatically incorrect but then again so are many other translations on Duolingo .. but the concept is brilliant