Complex sentence: Traumatic memories form as a result of exposure to traumatic experiences, which include natural disasters such as earthquakes and tsunamis; violent events such as hostage-taking, terrorist attacks, war, domestic abuse and rape.
Split into simpler sentences: Traumatic memories form as a result of exposure to traumatic experiences. Traumatic experiences include natural disasters such as earthquakes and tsunamis; violent events such as hostage-taking, terrorist attacks, war, domestic abuse and rape.