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.
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Question: Passage: By 1900, 7,531 people lived in the city. The population increased gradually to 13,913 in 1910. At about this time, the U.S. Veterans Administration had begun construction on the present Veterans Hospital. Many veterans who had been gassed in World War I and were in need of respiratory therapy began coming to Tucson after the war, due to the clean dry air. Over the following years the city continued to grow, with the population increasing to 20,292 in 1920 and 36,818 in 1940. In 2006 the population of Pima County, in which Tucson is located, passed one million while the City of Tucson's population was 535,000. Question: What was Tucson's population in 2006?

Answer: 535,000


Question: Passage: In 1967 Tom and Jerry cartoons first aired on BBC One, with around 2 episodes shown every evening at 17:00, with occasional morning showings on CBBC. The BBC stopped airing the famous cartoon duo in 2000. Question: On what channel was Tom and Jerry sometimes shown in the mornings?

Answer: CBBC


Question: Passage: Numerous communities of dark-skinned peoples are present in North Africa, some dating from prehistoric communities. Others are descendants of the historical Trans-Saharan trade in peoples and/or, and after the Arab invasions of North Africa in the 7th century, descendants of slaves from the Arab Slave Trade in North Africa. Question: When were the Arab Invasions?

Answer:
the 7th century