sentence: Orcas can be dangerous, and have been known to kill their attendants on rare occasions.
sentences_before: Female killer whales are often tamed and can be trained to do tricks for audiences in marine shows, like in Sea World. Sometimes, killer whales have even starred in movies, such as the movie titled 'Free Willy'.
concept_name: orca
headings: Killer Whale Temperament
categories: Oceanic dolphins