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.

[Q]: The Columbine High School massacre was a school shooting that occurred on April 20 , 1999 , at Columbine High School in Columbine , an unincorporated area of Jefferson County in the American state of Colorado . In addition to the shootings , the complex and highly planned attack involved a fire bomb to divert firefighters , propane tanks converted to bombs placed in the cafeteria , 99 explosive devices , and carbombs . The perpetrators , senior students Eric Harris and Dylan Klebold , murdered 12 students and one teacher . They injured 21 additional people , and three more were injured while attempting to escape the school . The pair subsequently committed suicide .
[A]: Columbine High School massacre

[Q]: The Social Gospel was a movement in North American Protestantism which applied Christian ethics to social problems , especially issues of social justice such as economic inequality , poverty , alcoholism , crime , racial tensions , slums , unclean environment , child labor , inadequate labor unions , poor schools , and the danger of war . It was most prominent in the early - 20th - century United States and Canada . Theologically , the Social Gospellers sought to operationalize the Lord 's Prayer ( Matthew 6 : 10 ) : '' Thy kingdom come , Thy will be done on earth as it is in heaven '' . They typically were post-millennialist ; that is , they believed the Second Coming could not happen until humankind rid itself of social evils by human effort . The Social Gospel was more popular among clergy than laity . Its leaders were predominantly associated with the liberal wing of the Progressive Movement , and most were theologically liberal , although a few were also conservative when it came to their views on social issues . Important leaders include Richard T. Ely , Josiah Strong , Washington Gladden , and Walter Rauschenbusch .
[A]: Social Gospel

[Q]: The iPhone 4 is a smartphone that was designed and marketed by Apple Inc . Following a number of notable leaks , the iPhone 4 was first unveiled on June 7 , 2010 , at Apple 's Worldwide Developers Conference in San Francisco , and was released on June 24 , 2010 , in the United States , United Kingdom , France , Germany and Japan . It is the 4th generation of iPhone , succeeding the 3GS and preceding the 4S .
[A]:
iPhone 4