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.

Example Input: 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 .
Example Output: Legends of Tomorrow

Example Input: `` Mack the Knife '' was introduced to the United States hit parade by Louis Armstrong in 1956 , but the song is most closely associated with Bobby Darin , who recorded his version at Fulton Studios on West 40th Street , New York City , on December 19 , 1958 ( with Tom Dowd engineering the recording ) . Even though Darin was reluctant to release the song as a single , in 1959 it reached number one on the Billboard Hot 100 and number six on the Black Singles chart , and earned him a Grammy Award for Record of the Year . Dick Clark had advised Darin not to record the song because of the perception that , having come from an opera , it would not appeal to the rock and roll audience . In subsequent years , Clark recounted the story with good humor . Frank Sinatra , who recorded the song with Quincy Jones on his L.A. Is My Lady album , called Darin 's the `` definitive '' version . Billboard ranked this version as the No. 2 song for 1959 . Darin 's version was No. 3 on Billboard 's All Time Top 100 . In 2003 , the Darin version was ranked # 251 on Rolling Stone 's `` 500 Greatest Songs of All Time '' list . On BBC Radio 4 's Desert Island Discs , pop mogul Simon Cowell named `` Mack the Knife '' the best song ever written . Darin 's version of the song was featured in the movies Quiz Show and What Women Want . Both Armstrong and Darin 's versions were inducted by the Library of Congress in the National Recording Registry in 2016 .
Example Output: Mack the Knife

Example Input: The Tuotuo River ( 沱 沱 河 , p Tuótuó Hé , lit . `` Tearful River '' is the official headstream of the Yangtze , and flows 358 km ( 222 mi ) from the glaciers of the Gelaindong Massif in the Tanggula Mountains of southwestern Qinghai to the confluence with the Dangqu River to form the Tongtian River . ) In Mongolian , this section of the river known as the Ulaan Mörön or the `` Red River '' .
Example Output:
Yangtze