Given the task definition and input, reply with output. In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.

Question: What country was Walker born in? Passage 1:Paul William Volley (born 2 November 1971 in Beckenham, Kent) is an English rugby union player. As an open-side flanker, he played for London Wasps for 16 years. He joined as a 16-year-old from Chinnor. Volley was first called up to the senior England squad by Clive Woodward for the 2000 England rugby union tour of South Africa, and then again for the 2003 England rugby union tour of Australasia. However he was ultimately never capped at this level. He has also been selected for England A on numerous occasions. He has won the Domestic and European competitions with London Wasps. This includes helping them win the Anglo-Welsh Cup in 1999 and 2000; he was a replacement in the 1999 final but started in 2000. After winning both the Zurich Premiership and Heineken Cup with Wasps in 2004, he headed across the Channel to play for Castres Olympique in France. He then returned to play for and captain Wasps' London rivals, Harlequins, and in 2008 signed a 2-year deal to play for RFU Championship side London Scottish.
 Passage 2:Walker was born at Belfast in September 1891. The son of a Queen's University music professor, Walker was educated at the Royal Belfast Academical Institution, before going up to Queen's University. He played his club cricket in Belfast for Cliftonville and Queen's University Cricket Club, before moving to Dublin in 1913 to study at Trinity College. Playing his club cricket in Dublin for Dublin University Cricket Club, Walker found himself called into the Ireland team in 1913 for their annual first-class match against Scotland, played at Edinburgh. Despite being a bowler, he did not bowl in the match, and in his one batting innings he was dismissed for 3 runs by Donald McDonald. He did not feature for Ireland after this match. Walker died at Bangor in January 1968.
 Passage 3:In 1014, after decades of war, the Byzantine Emperor Basil II scored a decisive victory over the Bulgarian Emperor Samuil in the battle of Kleidion. Samuil died of a heart attack on 6 October 1014 and the Byzantines took the opportunity to penetrate deep into Macedonia, the political heart of the Bulgarian Empire, and seized a number of important cities (Bitola, Prilep, Voden, Maglen). After the new Bulgarian Emperor Ivan Vladislav, who in 1015 assassinated Samuil's son and heir Gavril Radomir, had unsuccessfully tried to make an agreement with Basil II, he organized the defense of the country. The Bulgarians led by the Emperor, Krakra of Pernik and Ivats managed to return a number of towns and castles. The Byzantines were defeated in the battle of Bitola (September 1015) and at the siege of Pernik (summer of 1016).
2