"key","value"
edge_id         , '-'
left_brace      , {
attr_name_id    , 'color'
colon           , :
attr_value_id   , 'cyan'
semi_colon      , ;
right_brace     , }
edge_id         , '-'
left_brace      , {
attr_name_id    , 'color'
colon           , :
attr_value_id   , 'red'
semi_colon      , ;
right_brace     , }
