Given the question: Information: - The European Council "(French: Conseil europeen)", charged with defining the EU's overall political direction and priorities, is the institution of the European Union (EU) that comprises the heads of state or government of the member states, along with the President of the European Council and the President of the European Commission. The High Representative of the Union for Foreign Affairs and Security Policy also takes part in its meetings. Established as an informal summit in 1975, the European Council was formalised as an institution in 2009 upon the entry into force of the Treaty of Lisbon. Its current President is Donald Tusk. - A European political party (formally, a political party at European level; informally a Europarty) is a type of political party organisation operating transnationally in Europe and in the institutions of the European Union. They are regulated and funded by the European Union and are usually made up of national parties, not individuals. Europarties have the exclusive right to campaign during the European elections and express themselves within the European Parliament by their affiliated political groups and their MEPs. Europarties, through coordination meetings with their affiliated heads of state and government, influence the decision-making process of the European Council. Europarties also work closely and co-ordinate with their affiliated members of the European Commission and, according to the Lisbon Treaty the Europarty that wins the European elections has the right to nominate to the European Council its candidate for President of the European Commission. - Greece (' ), officially the Hellenic Republic (Greek: ' ), historically also known as Hellas ("" ), is a country in southeastern Europe. Greece's population is approximately 10.955 million as of 2015. Athens is the nation's capital and largest city, followed by Thessaloniki. - Turkey, officially the Republic of Turkey (Turkish: ), is a transcontinental country in Eurasia, mainly in Anatolia in Western Asia, with a smaller portion on the Balkan peninsula in Southeast Europe. Turkey is a democratic, secular, unitary, parliamentary republic with a diverse cultural heritage. Turkey is bordered by eight countries: Greece to the west; Bulgaria to the northwest; Georgia to the northeast; Armenia, the Azerbaijani exclave of Nakhchivan and Iran to the east; and Iraq and Syria to the south. The Aegean Sea is to the west, the Black Sea to the north, and the Mediterranean Sea to the south. The Bosphorus, the Sea of Marmara, and the Dardanelles, which together form the Turkish Straits, divide Thrace and Anatolia; they also separate Europe and Asia. Turkey's location has given it geopolitical and strategic importance throughout history. - The European Union (EU) is a political and economic union of member states that are located primarily in Europe. It has an area of , and an estimated population of over 510 million. The EU has developed an internal single market through a standardised system of laws that apply in all member states. EU policies aim to ensure the free movement of people, goods, services, and capital within the internal market, enact legislation in justice and home affairs, and maintain common policies on trade, agriculture, fisheries, and regional development. Within the Schengen Area, passport controls have been abolished. A monetary union was established in 1999 and came into full force in 2002, and is composed of 19 EU member states which use the euro currency. - The Coalition for Bulgaria ("Koalitsiya za Bulgaria", KB, or BSP - Left Bulgaria in 2014) is a leftist electoral alliance in Bulgaria, led by the Bulgarian Socialist Party. - The European Parliament (EP) is the directly elected parliamentary institution of the European Union (EU). Together with the Council of the European Union (the Council) and the European Commission, it exercises the legislative function of the EU. The Parliament is composed of 751 (previously 766) members, who represent the second largest democratic electorate in the world (after the Parliament of India) and the largest trans-national democratic electorate in the world (375million eligible voters in 2009). - Bulgaria (tr. '), officially the Republic of Bulgaria (tr. '), is a country in southeastern Europe. It is bordered by Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, and the Black Sea to the east. With a territory of , Bulgaria is Europe's 16th-largest country. - Romania is a sovereign state located in Southeastern Europe. It borders the Black Sea, Bulgaria, Ukraine, Hungary, Serbia, and Moldova. It has an area of and a temperate-continental climate. With 19.94 million inhabitants, the country is the seventh-most-populous member state of the European Union. The capital and largest city, Bucharest, with its 1,883,425 inhabitants is the sixth-largest city in the EU. - The Bulgarian Socialist Party (; "Bulgarska sotsialisticheska partiya", BSP), known as the Centenarian (, "Stoletnitsata"), is a social-democratic political party in Bulgaria and successor to the Bulgarian Communist Party. The BSP is a member of the Party of European Socialists and Socialist International. It is the leading component of the Coalition for Bulgaria centre-left coalition. - Sergei Dmitrievich Stanishev (born May 5, 1966) is a Bulgarian politician who was the leader of the Bulgarian Socialist Party (BSP) from 2001 until 2014. He is the President of the Party of European Socialists, the second-largest party in the European Parliament since 2011. He was Prime Minister of Bulgaria from 2005 to 2009. - Kristian Ivanov Vigenin ( Bulgarian : ; born 12 June 1975 ) is a Bulgarian politician , member of the Bulgarian Parliament , former Minister of Foreign Affairs of Bulgaria , and a former Member of the European Parliament . He became minister on May 29 , 2013 in the cabinet of Plamen Oresharski , where he served until the new government took office on August 6 2014 . In the European Parliament , Mr. Vigenin was a member of the Coalition for Bulgaria , part of the Party of European Socialists , and became an MEP on 1 January 2007 with the accession of Bulgaria to the European Union . - The Party of European Socialists (PES) is a social-democratic European political party. The PES comprises national-level political parties primarily from member states of the European Union (EU) and other nations of the European continent. The PES member parties are themselves mostly members of the Progressive Alliance or Socialist International. The political group in the European Parliament of the PES is the Progressive Alliance of Socialists and Democrats (S&D). The PES also operates in the Committee of the Regions (in the PES Group in the Committee of the Regions) and the European Council. The PES is currently led by Sergei Stanishev, former Prime Minister of Bulgaria. - Serbia, officially the Republic of Serbia, is a sovereign state situated at the crossroads of Central and Southeast Europe, covering the southern part of the Pannonian Plain and the central Balkans. Relative to its small territory, it is a diverse country distinguished by a "transitional" character, situated along cultural, geographic, climatic and other boundaries. Serbia is landlocked and borders Hungary to the north; Romania and Bulgaria to the east; Macedonia to the south; and Croatia, Bosnia-Herzegovina, and Montenegro to the southwest; it also claims a border with Albania through the disputed territory of Kosovo. Serbia numbers around 7 million residents, and its capital, Belgrade, ranks among the largest cities in Southeast Europe. What is the relationship between 'kristian vigenin' and 'bulgarian socialist party'?
The answer is:
member of political party