Detailed Instructions: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Q: Passage: The loss of industrial and working-class jobs in the city has resulted in high rates of poverty and associated problems. From 2000 to 2009, the city's estimated median household income fell from $29,526 to $26,098. As of 2010[update] the mean income of Detroit is below the overall U.S. average by several thousand dollars. Of every three Detroit residents, one lives in poverty. Luke Bergmann, author of Getting Ghost: Two Young Lives and the Struggle for the Soul of an American City, said in 2010, "Detroit is now one of the poorest big cities in the country." Question: Who said that Detroit is one of the poorest big cities in the country?
A:
Luke Bergmann