Q: 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: How long had Casualty been airing before its spinoff first aired? Passage 1:Mackinnon began her acting career in 1988, appearing in the Australian feature film Something About Love. Two further features followed, Dating the Enemy and Dust of the Wings, where she appeared in small roles, although her role in Dust of the Wing was a larger part. In 1997, she began to appear on television. She had a guest appearance on the fantasy television series , a sequel to the original series Spellbinder. Mackinnon is known for her role in the Baywatch spin-off series Baywatch: Hawaii, where she played the role of 'Allie Reese' opposite David Hasselhoff. She appeared as a regular during the show's first season. MacKinnon is best known for her role as 'Stevie Hall' (later 'Hall-Ryan') in the Logie Award-winning Australian television series McLeod's Daughters, where she appeared at the end of season three through the final season in 2009. Her role as Stevie earned her several Logie Award nominations, for Most Popular New Female Talent and Most Popular Actress. In 2007 & 2009, she received Gold Logie Award nominations. Mackinnon's other television work includes roles on Water Rats, All Saints, Sir Arthur Conan Doyle's The Lost World, The Cut, , Cops L.A.C. and City Homicide. In 2001, she appeared with Powers Boothe in the television mini-series Attila, which also featured Gerard Butler, and in 2003, she starred in the Syfy television film Deep Shock. Mackinnon also played roles in three direct-to-video films, Python, Dark Waters and Submission, for which she also served as producer.
 Passage 2:Casualty is a British medical drama television series that premiered on 6 September 1986 on BBC One. The series was created by Jeremy Brock and Paul Unwin. It is set in the fictional Holby City Hospital, in the equally fictitious city of Holby, and features occasional crossovers of characters and plots with spin-off show Holby City. Casualty follows the professional and personal lives of the doctors, nurses, paramedics, hospital management and patients at Holby General. It features an ensemble cast of regular characters, and began with 10 main characters in its first series, all but two – Charlie Fairhead (played by Derek Thompson) and Lisa "Duffy" Duffin (played by Cathy Shipton) – have since left the show. Many main characters have been written in and out of the series since. In addition, Casualty features guest stars each week, as well as recurring guests that take part in story arcs that span a portion of a series or multiple series.
 Passage 3:Anna Kraus, Op. 30 is a radio opera in one act by composer Franz Reizenstein. The work uses an English language libretto by Christopher Hassall to tell the tragic tale of a German woman who is forced to leave her country due to oppression from the Nazi regime, as the Nazis did not like her political views. The opera was commissioned by the British Broadcasting Corporation following the popular success of Reizenstein's 1951 cantata Voices of Night. The opera premiered on 25 July 1952 on BBC Third Programme with conductor Norman Del Mar leading the BBC Symphony Orchestra and singers Victoria Sladen (as Anna) and Lloyd Strauss-Smith (as Pavel). It was submitted by the BBC later that year for the Prix Italia. Critical reaction to the work was mixed. The New Statesman described the work as "engaging" and a "worthwhile experiment". The Annual Register wrote that the opera "suffered from the composer's emotion being too closely engaged in the sufferings of the heroine, a refugee from political oppression".

A:
2