Original sentence: Fleetwood Mac was arguably the most popular band in Europe at the time.Fleetwood Mac was formed in 1967 in London when Peter Green left the British blues band John Mayall & the Bluesbreakers
Edited sentence: Fleetwood Mac were arguably the most popular band in Europe at the time.Fleetwood Mac were formed in 1967 in London when Peter Green left the British blues band John Mayall & the Bluesbreakers