Instructions: 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.
Input: Question: Which of the lines that uses the A-series trains began first? Passage 1:NSB Class 73 () is a class of 22 electric multiple units built by Adtranz for the Norwegian State Railways. The four-car trains were modifications of Class 71, which was again based on the Swedish X2. The A-series consists of 16 intercity trains; they were delivered in 1999 and 2000 and are used on the Bergen, Dovre and Sørland Lines. The intercity service was branded as Signatur until 2003. The B-series consists of six regional trains delivered in 2002 and used on the Østfold Line. The regional trains were originally part of the Agenda concept. The trains have a power output of and a maximum speed of . They have an overall length of and have a capacity for 208 seated passengers in the A-series and 250 in the B-series. The trains have a tilting mechanism allowing for faster travel through curves.
 Passage 2:Sculptures of Tubman have been placed in several American cities. A 1993 Underground Railroad memorial fashioned by Ed Dwight in Battle Creek, Michigan features Tubman leading a group of slaves to freedom. In 1995, sculptor Jane DeDecker created a statue of Tubman leading a child, which was placed in Mesa, Arizona. Copies of DeDecker's statue were subsequently installed in several other cities, including one at Brenau University in Gainesville, Georgia. It was the first statue honoring Tubman at an institution in the Old South. The city of Boston commissioned Step on Board, a 10-foot-tall bronze sculpture by artist Fern Cunningham placed at the entrance to Harriet Tubman Park in 1999. It was the first memorial to a woman on city-owned land. Swing Low, a 13-foot statue of Tubman by Alison Saar, was erected in Manhattan in 2008. In 2009, Salisbury University in Salisbury, Maryland unveiled a statue created by James Hill, an arts professor at the university. It was the first sculpture of Tubman placed in the region where she was born.
 Passage 3:Creditsafe was founded in 1997 in Oslo, Norway with the idea of using the then emerging technology of the internet to supply business information to a market of smaller and medium-sized businesses by selling over the telephone and delivering reports over the internet. Following the Norwegian launch Creditsafe established an office in Gothenburg Sweden in 1998 before moving to the UK in 2000. Creditsafe re-located the UK sales operation to Caerphilly in South Wales in 2002. In 2006 Creditsafe France was launched in Roubaix near Lille. Additional entities were later launched in Dublin in Ireland in 2007, The Hague in the Netherlands in 2008, Berlin, Germany in 2010, Brussels, Belgium in 2011 and Turin in Italy in 2013. Creditsafe moved outside Europe in 2012 with the founding of Creditsafe United States in Allentown, Pennsylvania. Since launching in the USA, Creditsafe have now increased its US workforce by opening a new office in Tempe, Arizona Creditsafe established a shared service centre in Cardiff Bay, Wales in 2006 which has grown to support the sales operations around the world. In September 2016, Creditsafe set up its own operation in Japan. has its offices in Fukuoka and Tokyo

Output:
1