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Lossless data compression algorithms usually exploit statistical redundancy to represent data without losing any information, so that the process is reversible. Lossless compression is possible because most real-world data exhibits statistical redundancy. For example, an image may have areas of colour that do not change over several pixels; instead of coding "red pixel, red pixel, ..." the data may be encoded as "279 red pixels". This is a basic example of run-length encoding; there are many schemes to reduce file size by eliminating redundancy.

What may have colors that do not change over several pixels?
Answer: an image
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New Haven has a history of professional sports franchises dating back to the 19th century and has been the home to professional baseball, basketball, football, hockey, and soccer teams—including the New York Giants of the National Football League from 1973 to 1974, who played at the Yale Bowl. Throughout the second half of the 20th century, New Haven consistently had minor league hockey and baseball teams, which played at the New Haven Arena (built in 1926, demolished in 1972), New Haven Coliseum (1972–2002), and Yale Field (1928–present).

In what year was Yale field established in New Haven?
Answer: 1928
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Industries slowly brought the city and its inhabitants back to a renewed vitality and jobs attracted new residents. As the city's commerce improved, residents worked to restore or create community institutions. In 1865, the Avery Normal Institute was established by the American Missionary Association as the first free secondary school for Charleston's African American population. General William T. Sherman lent his support to the conversion of the United States Arsenal into the Porter Military Academy, an educational facility for former soldiers and boys left orphaned or destitute by the war. Porter Military Academy later joined with Gaud School and is now a university-preparatory school, Porter-Gaud School.

What type of school was the Avery Normal Institute?
Answer:
free secondary school