You will be given a definition of a task first, then some input of the task.
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.

Question: Did Seungri's car accident in Shanghai happen before or after he left Big Bang? Passage:There have been a number of car accidents involving Korean idols being followed by sasaeng fans. In 2011, two members of the band Super Junior were caught in a six-car collision after being chased by eight fan vehicles in Singapore. The band members, Leeteuk and Heechul, were unharmed, but Heechul later tweeted that he still suffered after-effects from the accident and was often afraid to drive. In 2013, Seungri, formerly of the band Big Bang, suffered minor injuries in a car accident in Shanghai involving a sasaeng fan. In 2015, Chanyeol of the band Exo wrote on Weibo that he was constantly followed by 20 fan vehicles during a visit to Shanghai. In 2016, Jackson of Got7 sustained minor injuries in an accident on the way to an airport in China that involved a fan closely following his car.

Output:
a