You will be given a definition of a task first, then some input of the task.
In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Antoaneta Stefanova (born 19 April 1979) is a Bulgarian chess grandmaster and a former Women's World Champion., Chess is a two-player strategy board game played on a chessboard, a checkered gameboard with 64 squares arranged in an eight-by-eight grid. Chess is played by millions of people worldwide, both amateurs and professionals., The Bulgarian Chess Championship is an event inaugurated in 1933 to crown the best chess player in Bulgaria. The championship has been held on a nearly annual basis since, with only a few years missed. In recent years some of the very best Bulgarian players have not participated in the championship, including former World Champions Veselin Topalov and Antoaneta Stefanova., 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., 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., Oleg Nikolaev Neikirch ( Neikirh , Nejkirch , Neykirch ) ( Bulgarian :    ) ( 8 March 1914 , Tbilisi , Georgia - 26 August 1985 , Bulgaria ) was a Bulgarian chess master . He won seven times Bulgarian Chess Championship ( 1937 , 1938 , 1940 ( jointly ) , 1943 , 1948 ( jointly ) , 1953 ( jointly ) , and 1957 ) . He represented Bulgaria in four Chess Olympiads ( 1939 , 1954 , 1958 , and 1960 ) . In 1939 , at second board in 8th Chess Olympiad in Buenos Aires ( +6 -- 5 = 4 ) ; In 1954 , at second board in 11th Chess Olympiad in Amsterdam ( +1 -- 2 = 4 ) ; In 1958 , at first board in 13th Chess Olympiad in Munich ( +1 -- 6 = 6 ) ; In 1960 , at third board in 14th Chess Olympiad in Leipzig ( +4 -- 4 = 6 ) . He tied for 2nd - 4th at Sofia 1957 ( zonal ; Miroslav Filip won ) , and took 15th at Portorož 1958 ( Interzonal ; Mikhail Tal won ) . He was awarded the International Master ( IM ) title in 1957 ., Veselin Aleksandrov Topalov (pronounced  born 15 March 1975) is a Bulgarian chess grandmaster and former FIDE World Chess Champion., 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., The Black Sea is a body of water between Eastern Europe and Western Asia, bounded by Bulgaria, Georgia, Romania, Russia, Turkey, and Ukraine. It is supplied by a number of major rivers, such as the Danube, Dnieper, Rioni, Southern Bug, and Dniester. The Black Sea has an area of (not including the Sea of Azov), a maximum depth of , and a volume of . It is constrained by the Pontic Mountains to the south and by the Caucasus Mountains to the east, and features a wide shelf to the northwest. The longest east-west extent is about ., Subject: oleg neikirch, Relation: occupation, Options: (A) chess player (B) game (C) grandmaster (D) major (E) sovereign (F) ukraine
Output:
chess player