Question: Information:  - Messenia ("Messinia") is a regional unit ("perifereiaki enotita") in the southwestern part of the Peloponnese, one of 13 regions into which Greece has been divided by the Kallikratis plan, implemented 1 January 2011. Before 2011 Messenia was a "nomos" (prefecture). The capital and the biggest city of Messenia in either case has been the city of Kalamata.  - Vassilis Leventis ( Greek :  (  )  , Greek pronunciation : ( vasios vasilis levendis ) ; born 1951 in Messene , Messenia ) is a Greek politician , leader of the Greek centrist party , Union of Centrists (   ) .  - A political party is a group of people who come together to contest elections and hold power in the government. The party agrees on some proposed policies and programmes, with a view to promoting the collective good or furthering their supporters' interests.  - Venizelism was one of the major political movements in Greece from the 1900s until the mid-1970s.  - Messini is a municipal unit ("dimotiki enotita") and seat ("edra") of the municipality ("dimos") of Messini within the regional unit ("perifereiaki enotita") of Messenia in the region ("perifereia") of Peloponnese, one of 13 regions into which Greece has been divided. Before 2011 the same hierarchy prevailed, according to Law 2539 of 1997, the Kapodistrias Plan, except that Messenia was a "nomos" and the Municipal unit was a locality ("topiko diamerisma"). The "dimos" existed under both laws, but not with the same constituents.  - 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.  - 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.  - The Union of Centrists is a political party in Greece. The leader and founder of the party is Vassilis Leventis. The political ideology of the party is Centrism and Venizelism and is strongly supporting Greece remaining an integral part of the European Union.  - Kalamata ("Kalamáta") is the second most populous city of the Peloponnese peninsula in southern Greece and the largest city of the homonymous administrative region. The capital and chief port of the Messenia regional unit, it lies along the Nedon River at the head of the Messenian Gulf.  - Messene (Greek:  "Messini"), officially Ancient Messene, is a local community ("topiki koinotita") of the municipal unit ("dimotiki enotita") Ithomi, of the municipality ("dimos") of Messini within the regional unit ("perifereiaki enotita") of Messenia in the region ("perifereia") of Peloponnese, one of 13 regions into which Greece has been divided. Before 2011 it held the same position in the administrative hierarchy, according to Law 2539 of 1997, the Kapodistrias Plan, except that Ithomi was an independent municipality and Ancient Messene was a local division ("topiko diamerisma") within it.    Given the information, choose the subject and object entities that have the relation of 'place of birth'.
Answer:
vassilis leventis , messini