Read this: Queen are one of the most bootlegged bands ever, according to Nick Weymouth, who manages the band's official website. A 2001 survey discovered the existence of 12,225 websites dedicated to Queen bootlegs, the highest number for any band. Bootleg recordings have contributed to the band's popularity in certain countries where Western music is censored, such as Iran. In a project called Queen: The Top 100 Bootlegs, many of these have been made officially available to download for a nominal fee from Queen's website, with profits going to the Mercury Phoenix Trust. Rolling Stone ranked Queen at number 52 on its list of the "100 Greatest Artists of All Time", while ranking Mercury the 18th greatest singer, and May the twenty-sixth greatest guitarist. Queen were named 13th on VH1's 100 Greatest Artists of Hard Rock list, and in 2010 were ranked 17th on VH1's 100 Greatest Artists of All Time list. In 2012, Gigwise readers named Queen the best band of past 60 years.

Where did Queen rank on Rolling Stone's 100 Greatest Artists of All Time in 2001?
What is the answer? (If it cannot be answered, return "unanswerable")
number 52