sentence: Many people say they have seen or heard ghosts.
sentences_before: Sometimes the ghosts in these stories exist because of some problem the person had during life or to say good bye to loved ones, that was not solved before he or she died. The ghost stays on the Earth trying to fix the problem. If the problem is fixed, the ghost can leave the Earth.
sentences_after: People who try to talk to ghosts as their job are called mediums.
concept_name: people
headings: Ghost
categories: Occult