What are the ten essentials? Give your answer in JSON, with the name and examples of each essential.

Context: The ninth edition of Mountaineering: The Freedom of the Hills, published in 2017, defines the Ten Essentials as:

Navigation: map, altimeter, compass, GPS device, personal locator beacon
Headlamp: with LED bulb and spare batteries
Sun protection: sunglasses, sun protective clothing, sunscreen
First aid: a first aid kit, wrapped in waterproof packaging
Knife: hikers on a short trip may also carry a multi-tool, strong adhesive tape and cordage; on a longer trip, further small tools may be useful
Fire: the means to both start and sustain a fire; either a butane lighter or matches, or other fire making device. Firestarters for igniting even wet wood, and in areas where no firewood will be available, a stove is highly advisable.
Shelter: plastic tube tent, jumbo plastic trash bag or bivy sack
Extra food: at least one day's food for a short hike, that should require no cooking.
Extra water: drinking water and the skills and tools to purify water
Extra clothes: additional items may be needed if spending the night in the emergency shelter



Answer: [
  {"name": "Navigation", "examples":  ["map", "altimeter", "compass", "GPS device", "personal locator beacon"]},
  {"name": "Headlamp", "examples":  ["LED headlamp", "spare batteries"]},
  {"name": "Sun protection", "examples":  ["sunglasses", "sun protective clothing", "sunscreen"]},
  {"name": "First aid", "examples":  ["first aid kit"]},
  {"name": "Knife", "examples":  ["knife", "multi-tool", "tape", "cordage"]},
  {"name": "Fire", "examples":  ["butane lighter", "matches", "firestarters", "stove"]},
  {"name": "Shelter", "examples":  ["plastic tube tent", "jumbo plastic trash bag", "bivy sack"]},
  {"name": "Extra food", "examples":  ["at least one day's food"]},
  {"name": "Extra water", "examples":  ["drinking water", "skills and tools to purify water"]},
  {"name": "Extra clothes", "examples":  ["items to spend the night"]}
]