text: CREATE TABLE week10_team_person 
  (
      id serial PRIMARY KEY,
      first_name varchar(255) NOT NULL,
      last_name varchar(255) NOT NULL,
      dob varchar(255) NOT NULL
  );
  
  CREATE TABLE week10_team_parentchild
  (
      id serial PRIMARY KEY,
      parent_id integer NOT NULL,
      child_id integer NOT NULL
  );
  
  ALTER TABLE week10_team_parentchild ADD CONSTRAINT week10_team_parentchild_fk0 FOREIGN KEY (parent_id) REFERENCES week10_team_person(id);
  ALTER TABLE week10_team_parentchild ADD CONSTRAINT week10_team_parentchild_fk1 FOREIGN KEY (child_id) REFERENCES week10_team_person(id);