Complex sentence: These trips are now widely regarded, as quoted by Rave magazine, to be the precursor of the beginning of the rave scene in the UK, in that they mirrored the use of secret locations, out of town venues and famous DJ's.
Split into simpler sentences: These trips are now widely regarded, as quoted by Rave magazine, to be the precursor of the beginning of the rave scene in the UK. Which mirrored the use of secret locations, out of town venues and famous DJ's.