instruction: Tell which of these musicians is a guitarist or a bassist:  Eddie Van Halen, Nikki Sixx, Steve Harris, Billy Sheehan, Steve Vai, Joe Satriani, Matthias Jabs, Jimmy Bain, Mick Mars, Vivian Campbell, Angus Young
response: Eddie Van Halen - Guitarist
  Nikki Sixx - Bassist
  Steve Harris - Bassist
  Billy Sheehan - Bassist
  Steve Vai - Guitarist
  Joe Satriani - Guitarist
  Matthias Jabs - Guitarist
  Jimmy Bain - Bassist
  Mick Mars - Guitarist
  Vivian Campbell - Guitarist
  Angus Young - Guitarist