What is {inventor or discoverer} of {Dobsonian telescope}, that has {location born} is {Beijing} ?
Who is the innovator or pioneer of Dobsonian telescope, whose area of birth is Beijing?
Who is the inventor or discoverer of Dobsonian telescope, whose location of birth is Beijing?
SELECT ?w WHERE { resource:Dobsonian_telescope property:discoverer_or_inventor ?w . ?w property:place_of_birth resource:Beijing }
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SELECT ?answer WHERE { wd:Q1430326 wdt:P61 ?answer . ?answer wdt:P19 wd:Q956}
John Dobson