http://dbpedia.org/resource/History_of_lighthouses +
, http://dbpedia.org/resource/Flash_%28photography%29 +
, http://dbpedia.org/resource/Robert_Frost +
, http://dbpedia.org/resource/William_Doud_Packard +
, http://dbpedia.org/resource/James_Ward_Packard +
, http://dbpedia.org/resource/Timeline_of_London_%281800s%29 +
, http://dbpedia.org/resource/Super_Trouper_%28spotlight%29 +
, http://dbpedia.org/resource/St_Catherine%27s_Lighthouse +
, http://dbpedia.org/resource/Searchlight +
, http://dbpedia.org/resource/Cumberland_Drive-In +
, http://dbpedia.org/resource/Camp_Bouse +
, http://dbpedia.org/resource/Dungeness_Lighthouse +
, http://dbpedia.org/resource/South_Foreland_Lighthouses +
, http://dbpedia.org/resource/Timeline_of_Russian_innovation +
, http://dbpedia.org/resource/Lizard_Lighthouse +
, http://dbpedia.org/resource/Museum_Boerhaave +
, http://dbpedia.org/resource/Konstantinos_Fostiropoulos +
, http://dbpedia.org/resource/Thorium_tetrafluoride +
, http://dbpedia.org/resource/Lanthanum +
, http://dbpedia.org/resource/Electrification +
, http://dbpedia.org/resource/Xenon +
, http://dbpedia.org/resource/Cape_Arkona_Lighthouses +
, http://dbpedia.org/resource/Battlefield_illumination +
, http://dbpedia.org/resource/The_Tempest +
, http://dbpedia.org/resource/Xenon_arc_lamp +
, http://dbpedia.org/resource/Anglo_Great_Lakes_Graphite_Plant +
, http://dbpedia.org/resource/Arc_converter +
, http://dbpedia.org/resource/Signal_lamp +
, http://dbpedia.org/resource/Erkelenz +
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