#mart__marketplace  an area in a town where a public mercantile establishment is set up
  supertype:  mercantile_establishment__retail_store__sales_outlet__salesoutlet__outlet  a place of business for retailing goods
  subtype:  agora.mart__forum__public_square  a place of assembly for the people in ancient Greece
  subtype:  bazar__bazaar  a street of small shops (especially in Orient)
  subtype:  grocery_store__grocerystore__grocery__food_market__market  a marketplace where groceries are sold; "the grocery store included a meat market"
     subtype:  greengrocery  (British) a greengrocer's grocery store
     subtype:  supermarket  a large self-service grocery store selling groceries and dairy products and household goods
        subtype:  hypermarket  (British) a huge supermarket (usually built on the outskirts of a town)
  subtype:  open-air_market__open-air_marketplace__market_square  a public marketplace where food and merchandise is sold
     subtype:  farmer's_market__greenmarket  an open-air marketplace for farm products
     subtype:  souk  an open-air market in an Arabian city
  subtype:  slave_market__slavemarket  a marketplace where slaves were auctioned off (especially in the southern United States before the Civil War)
  subtype:  agora  the marketplace in ancient Greece
  subtype:  flea_market  an open-air street market for inexpensive or secondhand articles

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