#line  a formation of people or things one beside another; "the line of soldiers advanced with their bayonets fixed"; "they were arrayed in line of battle"; "the cast stood in line for the curtain call"
  supertype:  #formation_acting_as_a_unit__formation  an arrangement of people or things acting as a unit; "a defensive formation"; "a formation of planes"
  subtype:  #rivet_line__rivetline  a line of rivets at a seam; "the fuselage cracked along the rivet line"
  subtype:  #chorus_line__chorus  a body of dancers or singers who perform together
     subtype:  #corps_de_ballet__ensemble  the chorus of a ballet company
  subtype:  #diagonal.line  an oblique line of squares of the same color on a checkerboard; "the bishop moves on the diagonals"
     subtype:  #main_diagonal__principal_diagonal__principaldiagonal  the diagonal of a square matrix running from the upper left entry to the lower right entry
     subtype:  #secondary_diagonal__secondarydiagonal  the diagonal of a square matrix running from the lower left entry to the upper right entry
  subtype:  #linemen  the football players who line up on the line of scrimmage
  subtype:  #lineup  a line of persons arranged by police for inspection or identification
  subtype:  #row  an arrangement of objects or people side by side in a line: "a row of chairs"
     subtype:  #serration.row  a row of notches; "the pliers had serrations to improve the grip"
  subtype:  #rank.line  a row or line of people (especially soldiers or police) standing abreast of one another; "the entrance was guarded by ranks of policemen"

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