Given the task definition and input, reply with output. 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: What position did Luke Wall play for the Blackburn Rovers? Passage:Wall was born in Liverpool and started his career with Blackburn Rovers as a youth player joining at under-14 level. In the summer of 2015 he signed his first professional contract after completing his scholarship with the academy. In November 2015, he joined Northern Premier League Premier Division side Skelmersdale United on a one-month youth loan. In the summer of 2016 he was released by Blackburn and joined League Two side Accrington Stanley on a one-year contract following a trial. He was recommended to the club by former Blackburn teammate and Accrington player John O'Sullivan. He made his first team debut for the club in August 2016 as a second-half substitute for Sean McConville in the 30 defeat to Crewe Alexandra in an EFL Trophy group-stage match. After struggling to break through into the match-day squad, he returned to Skelmersdale for a second loan spell in September 2016. In February 2017, he was sent out on loan again, joining Northern Premier League Division One North side Clitheroe on a short-term deal. He made a total of seven appearances in all competitions during the loan spell, scoring twice in a 43 away win over Ramsbottom United. In March 2017, he was on the move again joining Northern Premier League Premier Division side Marine on loan until the end of the season.
a