Definition: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: What stadium does the team play at which defeated Sunderland 1-0 to open the month of September? Passage:Sunderland opened the month with a 1–0 defeat away to Manchester United on 1 September, Louis Saha scored the winner 18 minutes from full-time. Roy Keane said "I'm delighted with the overall performance. It would have been nice to test their goalkeeper a bit more but overall I'm delighted with the players' efforts." about the team's display. Jack Pelter signed for Sunderland on 8 September, from New Zealand team Canterbury United, on a free transfer in an original one-month deal. Two weeks after the defeat to Manchester United, Sunderland beat Reading 2–1 on 15 September. Kenwyne Jones and Ross Wallace scored the Sunderland goals in a game which was overshadowed by the tribute paid to 1973 FA Cup Final scorer Ian Porterfield who died on 11 September 2007. Sunderland met Middlesbrough on 22 September in their first north east derby of the season. Grant Leadbitter scored in the 2nd minute to put Sunderland in front, but two ex-Sunderland players; Julio Arca and Stewart Downing put Middlesbrough into the lead. Liam Miller scored an 89th minute volley to save a point for Sunderland. Grant Leadbitter scored his second goal in as many games on 29 September as Blackburn Rovers beat Sunderland 2–1.


b