#kerb__curb  an edge between a sidewalk and a roadway consisting of a line of curbstones (usually forming part of a gutter)
  supertype:  edge  a sharp side formed by the intersection of two surfaces of an object; "he rounded the edges of the box"
  part:  curbstone__kerbstone  a paving stone forming part of a curb

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