Does the sentence "While the original Xbox sold poorly in Japan, selling just 2 million units while it was on the market (between 2002 and 2005),[citation needed] the Xbox 360 sold even more poorly, selling only 1.5 million units from 2005 to 2011." provide a valid answer to the question "How many original Xboxes were sold in Japan between 2002 and 2005?"

A: yes

Does the sentence "The works for piano and orchestra, including the two concertos, are held by Temperley to be "merely vehicles for brilliant piano playing ... formally longwinded and extremely conservative"." provide a valid answer to the question "Who wrote that "improvisation is designed for an audience"?"

A: no

Does the sentence "William Henry Pyne notes in his book The Microcosm of London (1808) that:" provide a valid answer to the question "What was the name of William Henry Pyne book from 1808?"

A: yes

Does the sentence "The process exploits the greater ease of converting iron sulfides into its oxides, which in turn react with the silica to form the silicate slag, which floats on top of the heated mass." provide a valid answer to the question "What happens to the silicate slag during the flash smelting process?"

A:
yes