Complex sentence: On 6 December, 1992 a large gathering of an estimated 150,000 Hindu activists that had been promised to be peaceful and orderly degenerated quickly as a large number of people broke the erected barriers and demolished the mosque structure.
Split into simpler sentences: On 6 December 1992, a large gathering of an estimated 150,000 Hindu activists that had been promised to be peaceful and orderly degenerated quickly. A large number of people broke the erected barriers and demolished the mosque structure.