#backpack__back_pack__knapsack__packsack__rucksack__haversack  a bag carried by a strap on your back or shoulder
  supertype:  #bag  a flexible container with a single opening; "he stuffed his laundry into a large bag"
  subtype:  #kitbag__kit_bag  a knapsack (usually for a soldier)

No statement uses or specializes #backpack; click here to add one.