text: DROP TABLE IF EXISTS conreality.group CASCADE;
  
  -- A group of objects (e.g., a unit or a swarm).
  CREATE TABLE conreality.group (
    -- The group's sequential identifier (ID).
    id    bigint NOT NULL PRIMARY KEY REFERENCES conreality.entity ON DELETE CASCADE,
    -- The group's designated label.
    label varchar(31) NULL CHECK (label <> '') UNIQUE
  );
  