Complex sentence: One afternoon, Mary receives a phone call and abruptly departs, leaving Simon on the street, when he tracks her down at the house, she reveals that she discovered he had been lying, using gunpowder and sulfur to commit the "paranormal" experiences.
Split into simpler sentences: One afternoon, Mary receives a phone call and abruptly departs, leaving Simon on the street. When he tracks her down at the house, she reveals that she discovered he had been lying, using gunpowder and sulfur to create the "paranormal" experiences.