#signboard__sign  structure displaying a board on which advertisements can be posted; "the highway was lined with signboards"
  supertype:  #physical_structure__structure__construction  a thing constructed; a complex construction or entity; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
  subtype:  #billboard__hoarding  large outdoor signboard
  subtype:  #sandwich_board  signboard consisting of two hinged boards that hang front and back from the shoulders of a walker and are used to display advertisements
  subtype:  #shingle  a small signboard outside the office of a lawyer or doctor, e.g.

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