Athens and Tirana signed an accord in May to legalise the status of Albanian immigrant workers , estimated at 350,000 , and remove a long-standing stumbling block in relations between the two Balkan neighbours .
<response> <location>Athens</location> and <location>Tirana</location> signed an accord in May to legalise the status of <misc>Albanian</misc> immigrant workers , estimated at 350,000 , and remove a long-standing stumbling block in relations between the two <location>Balkan</location> neighbours . </response>