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.

Ex Input:
They put out two self - released albums , Twenty One Pilots in 2009 and Regional at Best in 2011 , before being signed by Fueled by Ramen in 2012 . Their label debut , Vessel , was released in 2013 . The duo achieved breakthrough success with their fourth album , Blurryface ( 2015 ) , which produced the successful singles `` Stressed Out '' and `` Ride '' . In addition , the single `` Heathens '' , recorded for the soundtrack of the film Suicide Squad , made the group the first alternative artist to have two concurrent top ten singles in the US . The duo 's fifth studio album , Trench , was released on October 5 , 2018 . They have won a Grammy Award for Best Pop Duo / Group Performance .

Ex Output:
Twenty One Pilots


Ex Input:
`` Tropical '' refers to the geographical origin of these systems , which form almost exclusively over tropical seas . `` Cyclone '' refers to their winds moving in a circle , whirling round their central clear eye , with their winds blowing counterclockwise in the Northern Hemisphere and blowing clockwise in the Southern Hemisphere . The opposite direction of circulation is due to the Coriolis effect . Tropical cyclones typically form over large bodies of relatively warm water . They derive their energy through the evaporation of water from the ocean surface , which ultimately recondenses into clouds and rain when moist air rises and cools to saturation . This energy source differs from that of mid-latitude cyclonic storms , such as nor'easters and European windstorms , which are fueled primarily by horizontal temperature contrasts . Tropical cyclones are typically between 100 and 2,000 km ( 62 and 1,243 mi ) in diameter .

Ex Output:
Tropical cyclone


Ex Input:
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 .

Ex Output:

Middle Ages