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 were the combined ages of Sabrina Washington and Alesha Dixon the year that they met at Dance Attic studios? Passage:Alesha Dixon and Sabrina Washington met in 1997 at Dance Attic studios in Fulham through Louise Porter, who was putting together a group for her production company Big Out Ltd. The two worked with Louise Porter for a couple of years before being joined by Tina Barrett to form a trio performing singing and dancing. They were named Face2Face, were unsigned, and all band members still worked day jobs. Barrett left to join S Club 7 after a successful audition for Simon Fuller and was replaced by Zena McNally and Su-Elise Nash. Their then producer David Brant (writer of their first two hit singles, "Why?" and "All I Want") introduced them via DJ Darren Stokes (TinTinOut) to Inferno Records (sub pop) A&R man Pat Travers, who went on to sign them to Telstar Records and changed their name to Mis-Teeq. After months of recording—including sessions with producers Norwegian duo Stargate along with Brant (Vybrant Music), Ed Case, Blacksmith, Rishi Rich, and Ceri Evans—Mis-Teeq released their debut single in 2000, "Why?", a Latin-flavoured mid-tempo song co-written and produced by Brant. A garage remix by Matt "Jam" Lamont soon became a success in the underground UK garage scene, and as a result a second music video for the song was filmed and released. "Why" became a hit on the UK Singles Chart with a peak position of number eight. McNally decided to leave the line-up in spring 2001 saying she felt unhappy about "an unbalance in the group".


a