Given the task definition, example input & output, solve the new input case.
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: The Beatles ' rooftop concert was the final public performance of the English rock band the Beatles . On 30 January 1969 , the band , with keyboardist Billy Preston , surprised a central London office and fashion district with an impromptu concert from the roof of the headquarters of the band 's multimedia corporation Apple Corps at 3 Savile Row . In a 42 - minute set , the Beatles were heard playing nine takes of five songs before the Metropolitan Police Service asked them to reduce the volume . Footage from the performance was later used in the 1970 documentary film Let It Be .

Output: The Beatles' rooftop concert
'The answer given is correct because it is an appropriate title as it is the main subject of the passage.

New input case for you: The Willis Tower , built as and still commonly referred to as the Sears Tower , is a 110 - story , 1,450 - foot ( 442.1 m ) skyscraper in Chicago , Illinois , United States . At completion in 1973 , it surpassed the World Trade Center towers in New York to become the tallest building in the world , a title it held for nearly 25 years and remained the tallest building in the Western Hemisphere until 2014 and the completion of a new building at the World Trade Center site . The building is considered a seminal achievement for its architect Fazlur Rahman Khan . The Willis Tower is the second - tallest building in the United States and the Western hemisphere -- and the 16th - tallest in the world . More than one million people visit its observation deck each year , making it one of Chicago 's most popular tourist destinations . The structure was renamed in 2009 by the Willis Group as part of its lease on a portion of the tower 's space .
Output:
Willis Tower