Complex sentence: Caitlin McNeill, a Hebrides-based member of a Scottish folk music group named Canach, first discovered the dress photo on Facebook; the band had been booked to play at a wedding in Colonsay of McNeil's friends, Grace and Keir Johnston.
Split into simpler sentences: Caitlin McNeill, a Hebrides-based member of a Scottish folk music group named Canach, first discovered the dress photo on Facebook. Her band had been booked to play at a wedding in Colonsay of McNeil's friends, Grace and Keir Johnston.