Utilize the input text as a context reference, choose the right relationship between 'Merkel' and 'Germany' from the options.
Options: subsidiary, headquarters location, location of formation, distribution format

Speaking in Istanbul at a joint news conference with Turkish Prime Minister Ahmet Davutoglu, Merkel said Germany could help accelerate the path to visa-free travel to the EU for Turks and push forward Ankara's protracted EU membership talks.
headquarters location