This video says about itself:
23 July 2017
Police turned water cannons and pepper spray on protesters decrying the arrest of two Turkish teachers in Ankara on Sunday.
From Ekathimerini daily in Greece, 16 December 2017:
All state workers or teachers, the Turks claimed they feared persecution in their country, where Turkish President Recep Tayyip Erdogan launched a purge of the civil service and armed forces after a failed coup in 2016.
Coming just a few days after a tense visit to Greece by Erdogan, who demanded the extradition of eight military officers who fled to Greece after the failed coup, there are fears that an asylum request from the 32 Turks could further strain bilateral [NATO] ties.
Around 1,000 Turks have applied for asylum in Greece since July 2016.