#explorer__adventurer  someone who travels into little known regions (especially for some scientific purpose)
  supertype:  person__individual__someone__somebody__mortal__human__human_being__humanbeing__soul  a human being; "there was too much for one person to do"
  instance:  Roald_Amundsen  Louis_Antoine_de_Bougainville  Sir_Richard_Francis_Burton  Richard_Evelyn_Byrd  Sebastian_Cabot  Samuel_de_Champlain  William_Clark  Francisco_Fernandez_Cordoba  Cousteau  Sir_Matthew_Flinders  John_Charles_Fremont  Sir_Martin_Frobisher  Charles_Francis_Hall  Louis_Jolliet  Sieur_de_LaSalle  Meriwether_Lewis  David_Livingstone  Sir_Alexander_Mackenzie  Fridtjof_Nansen  Mungo_Park  Robert_Edwin_Peary  Francisco_Pizarro  Kund_Johan_Victor_Rasmussen  Sir_James_Clark_Ross  Sir_John_Ross  Henry_Rowe_Schoolcraft  Robert_Falcon_Scott  John_Smith  John_Hanning_Speke  Sir_Henry_Morton_Stanley  Otto_Neumann_Sverdrup  Sebastian_Vizcaino  Charles_Wilkes  George_Hubert_Wilkins
  subtype:  conquistador  an adventurer (especially one who led the Spanish conquest of Mexico and Peru in the 16th century)
     instance:  Hernando_Cortes__Cortes__Cortez__Hernando_Cortez__Hernan_Cortes__Hernan_Cortez
  subtype:  underwater_diver__diver__frogman  someone who works underwater
     subtype:  deep-sea_diver  a diver in the deeper parts of the sea
     subtype:  pearl_diver__pearldiver__pearler  a diver who searches for molluscs containing pearls
     subtype:  scuba_diver__scubadiver  an underwater diver who uses scuba gear
  subtype:  navigator  in earlier times, a person who explored by ship
     instance:  Vasco_Nunez_de_Balboa__Balboa  Vitus_Bering__Bering__Behring__Vitus_Behring  John_Cabot__Cabot__Giovanni_Cabato  Jacques_Cartier__Cartier  Christopher_Colombus__Columbus__Cristoforo_Colombo__Cristobal_Colon  Captain_James_Cook__Cook__James_Cook__Captain_Cook  Vasco_da_Gamma__da_Gamma__Gamma  John_Davys__Davys__Davis__John_Davis  Bartholomeu_Dias__Dias__Diaz__Bartholomeu_Diaz  Sir_Francis_Drake__Drake__Francis_Drake  Sir_Martin_Frobisher__Frobisher  Sir_Humphrey_Gilbert__Gilbert__Humphrey_Gilbert  Robert_Gray__Gray  Henry_Hudson__Hudson  Ferdinand_Magellan__Magellan__Fernao_Magalhaes  Abel_Janszoon_Tasman__Tasman__Abel_Tasman  George_Vancouver__Vancouver  Giovanni_da_Verrazano__Verrazano__Verrazzano__Giovanni_da_Verrazzano  Amerigo_Vespucci__Vespucci__Americus_Vespucius
  subtype:  potholer__spelunker__spelaeologist  a person who explores caves

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