Utilize the input text as a context reference, choose the right relationship between 'Air Berlin' and 'Etihad Airways' from the options.
Options: business division, legal form, parent organization, publisher

And he said he could not envisage getting into the kind of partnership low-cost rival Air Berlin (Xetra: AB1000 - news ) has forged with Abu Dhabi-based Etihad Airways , which also now controls Alitalia.
parent organization