instruction:
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.
question:
DC 's Legends of Tomorrow , or simply Legends of Tomorrow , is an American superhero action - adventure television series developed by Greg Berlanti , Marc Guggenheim , Andrew Kreisberg , and Phil Klemmer , who are also executive producers along with Sarah Schechter and Chris Fedak ; Klemmer and Fedak serve as showrunners . The series , based on the characters of DC Comics , airs on The CW and is a spin - off from Arrow and The Flash , existing in the same fictional universe . The series premiered on January 21 , 2016 . In January 2017 , The CW renewed the series for a third season , which is scheduled to debut on October 10 , 2017 .
answer:
Legends of Tomorrow

question:
While the show initially enjoyed high ratings , the average rating of the show at the end of its first season dropped to 52nd out of 94 programs . Unhappy with the show 's ratings , NBC threatened to cancel the show during its second season . The show 's fan base , led by Bjo Trimble , conducted an unprecedented letter - writing campaign , petitioning the network to keep the show on the air . NBC renewed the show , but moved it from primetime to the '' Friday night death slot '' , and substantially reduced its budget . In protest Roddenberry resigned as producer and reduced his direct involvement in Star Trek , which led to Fred Freiberger becoming producer for the show 's third and final season . Despite another letter - writing campaign , NBC cancelled the series after three seasons and 79 episodes .
answer:
Star Trek

question:
In the history of Europe , the Middle Ages or Medieval Period lasted from the 5th to the 15th century . It began with the fall of the Western Roman Empire and merged into the Renaissance and the Age of Discovery . The Middle Ages is the middle period of the three traditional divisions of Western history : classical antiquity , the medieval period , and the modern period . The medieval period is itself subdivided into the Early , High , and Late Middle Ages .
answer:
Middle Ages