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 bands had the drummer and bassist that were asked to join Opeth played with before? Passage:Åkerfeldt and Lindgren, the two remaining members of the band, asked drummer Martin Lopez and bassist Martín Méndez to join the band, both of whom accepted. In 1999, they released the concept album Still Life. Steven Wilson joined Opeth in the studio for their fifth album, 2001's Blackwater Park, producing and providing extra backing vocals and instruments. The band supported the album with their first worldwide tour. After promoting the album, Opeth entered the studio again, recording two albums. The first album, Deliverance that was released in 2002, debuted at number 19 on the Top Heatseekers in the United States. The second album, Damnation was released a year later, and peaked at number 192 on the Billboard 200. Per Wiberg joined the band as a keyboardist and recorded Ghost Reveries, which peaked at number 64 on the Billboard 200. Lopez and Lindgren both left Opeth and were replaced by Martin Axenrot and Fredrik Åkesson. In 2008, the band released their ninth studio album Watershed, which debuted at number 23 on the Billboard 200 and peaked at the top of the Finnish charts. Their tenth studio album Heritage which released in 2011, debuted at number 19 on the Billboard 200, at number 2 on the US Hard Rock Albums and at number 6 on the Rock Albums charts, making it highest charting record to date. The album also peaked at number 22 on the UK Albums chart.


a