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: '' Flight of the Bumblebee '' is an orchestral interlude written by Nikolai Rimsky - Korsakov for his opera The Tale of Tsar Saltan , composed in 1899 -- 1900 . Its composition is intended to musically evoke the seemingly chaotic and rapidly changing flying pattern of a bumblebee . Despite the piece 's being a rather incidental part of the opera , it is today one of the more familiar classical works because of its frequent use in popular culture .
Example Output: Flight of the Bumblebee

Example Input: The First Battle of Bull Run ( the name used by Union forces ) , also known as the Battle of First Manassas ( the name used by Confederate forces ) , was fought on July 21 , 1861 in Prince William County , Virginia , just north of the city of Manassas and about 25 miles west - southwest of Washington , D.C. It was the first major battle of the American Civil War . The Union 's forces were slow in positioning themselves , allowing Confederate reinforcements time to arrive by rail . Each side had about 18,000 poorly trained and poorly led troops in their first battle . It was a Confederate victory , followed by a disorganized retreat of the Union forces .
Example Output: First Battle of Bull Run

Example Input: Gram staining differentiates bacteria by the chemical and physical properties of their cell walls by detecting peptidoglycan , which is present in the cell wall of Gram - positive bacteria . Gram - negative cells also contain peptidoglycan , but a very small layer of it that is dissolved when the alcohol is added . This is why the cell loses its initial colour from the primary stain . Gram - positive bacteria retain the crystal violet dye , and thus are stained violet , while the Gram - negative bacteria do not ; after washing , a counterstain is added ( commonly safranin or fuchsine ) that will stain these Gram - negative bacteria a pink color . Both Gram - positive bacteria and Gram - negative bacteria pick up the counterstain . The counterstain , however , is unseen on Gram - positive bacteria because of the darker crystal violet stain .
Example Output:
Gram stain