Complex sentence: In 1993, the "Mirror Group Newspapers (MGN)" published photographs of the Princess taken by gym owner Bryce Taylor which showed her exercising in the gym LA Fitness wearing "a leotard and cycling shorts".
Split into simpler sentences: In 1993, the "Mirror Group Newspapers (MGN)" published photographs of the Princess that were taken by gym owner Bryce Taylor. The photos showed her exercising in the gym LA Fitness wearing "a leotard and cycling shorts".