Definition: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.
Input: Question: What skiier placed first in the 2007 giant slalom event where Karlsen finished sixth? Passage:Truls Ove Karlsen (born 25 April 1975 in Oslo) is a retired Norwegian alpine skier. He made his Alpine Skiing World Cup debut in Solden in 2001. He made a total of 143 World Cup starts, finishing third in a slalom in Sestriere in December 2002 and scoring his only World Cup win in a slalom in Kranjska Gora in February 2004, leading home team-mate Tom Stiansen in a Norwegian one-two ahead of Austrian Mario Matt. His best World Cup seasons were 2003 and 2004, where he finished eighth in the slalom standings. His best results at the Alpine Skiing World Championships were achieved at the 2007 Championships in Are, where he finished sixth in the giant slalom and seventh in the slalom. He represented Norway at the 2010 Winter Olympics. Karlsen announced his retirement from competition in February 2013. Since then he has worked as a personal trainer. He graduated from the Norwegian University of Science and Technology with a bachelor's degree in History and Psychology in 2004, and started studies for a master's degree in law at the University of Oslo in 2013.

Output:
a