Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.

The Teenage Mutant Ninja Turtles ( often shortened to TMNT or Ninja Turtles ) are four fictional teenaged anthropomorphic turtles named after Italian artists of the Renaissance . They were trained by their anthropomorphic rat sensei in the art of ninjutsu . From their home in the sewers of New York City , they battle petty criminals , evil overlords , mutated creatures , and alien invaders while attempting to remain hidden from society . They were created by Kevin Eastman and Peter Laird .
Teenage Mutant Ninja Turtles