Complex sentence: The chinaberry tree being struck by lightning may be representative of Calixta's sin in a Catholic area, where adultery is considered a sin that is so grave that it sends one to hell unless the individual repents before death.
Split into simpler sentences: The chinaberry tree being struck by lightning may be representative of Calixta's sin in a Catholic area. Adultery is considered a sin that is so grave that it sends one to hell unless the individual repents before death.