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.
Q: Question: In what order were the O'Mara sons born to Stephen O'Mara(listed by name)? Passage 1:Race 1 was held on Saturday 10 May. Mark Winterbottom took his second race victory of the year, a surprisingly comfortable win ahead of the HRT pair of Mark Skaife and Garth Tander. Tander was pushed hard by Steven Richards and Craig Lowndes. A collision at race start saw Jason Bright touch Greg Murphy who in turn made contact with Michael Caruso, sending Bright and Caruso out of control towards turn 7, where crossing the track Caruso struck Shane van Gisbergen. The incident triggered a safety car. Jamie Whincup and Will Davison charged through to seventh and eight positions from poor qualifying places. James Courtney was fighting amongst that group but fading rear tyres led Courtney to attempt defensive moves that raised the ire of race control, leading to first the bad sportsmanship flag, then a black flag drive through penalty which dropped him down field.
Passage 2:Airey was born in Oldham, Lancashire on 25 August 1894. He joined Robert Watson-Watt in 1924, and was an original member of the radar team, responsible for masts and support equipment. He was Senior Technical Officer at Telecommunications Research Establishment. Alongside Arnold Wilkins, Airey is credited with having discovered Bawdsey Manor, Ordfordnessas a site for the Air Ministry department that was significant in the history of radar. In his book "Three Steps to Victory" Robert Watson-Watt proclaims Joe Airey's greatest constructional achievement as the installation of a mast atop the Great Pyramid at Cheops. During World War I, Airey was a member of the Dunsterforce in the Persia and the Middle East. By the time of his retirement, he was Station Engineer at the Royal Radar Establishment. He was appointed a Member of the Order of the British Empire (MBE) for his services by King George VI in his Birthday Honours on 14 June 1945. Airey died in Poole Dorset on 10 February 1976.
Passage 3:O'Mara was the third son of Stephen O'Mara, Snr, a former Mayor of Limerick and briefly an Irish Parliamentary Party MP. Stephen Jr. married Nancy O'Brien and had a son, Peter. His elder brother James was an early supporter of Sinn Fein, which Stephen also joined after the Easter Rising. He was a member of Limerick Corporation when the Irish War of Independence began. The Mayor of Limerick, George Clancy, was killed by the Black and Tans on 7 March 1921, and O'Mara was elected in his place on 22 March. In May, he went to the United States to replace his brother James as "fiscal agent" raising Dail funds for the Irish Republic. He was re-elected mayor in January 1922, and opposed the Anglo-Irish Treaty. The fact that Dail Eireann funds in the US were in O'Mara's name as trustee caused legal difficulties for the pro-Treaty administration.

A:
3