Refer to the input text as context and select the correct relationship between 'Merkel' and 'Germany' from the available options.
Options: distribution format, subsidiary, headquarters location, location of formation

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