Matches in DBpedia 2015-10 for { ?s ?p "Charles Green (31 January 1785 – 26 March 1870) was the United Kingdom's most famous balloonist of the 19th century. He experimented with coal gas as a cheaper and more readily available alternative to hydrogen for lifting power. His first ascent was in a coal gas balloon on 19 July 1821. He became a professional balloonist and had made 200 ascents by 1835."@en }
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- Charles_Green_(balloonist) comment "Charles Green (31 January 1785 – 26 March 1870) was the United Kingdom's most famous balloonist of the 19th century. He experimented with coal gas as a cheaper and more readily available alternative to hydrogen for lifting power. His first ascent was in a coal gas balloon on 19 July 1821. He became a professional balloonist and had made 200 ascents by 1835.".