text: DROP TABLE IF EXISTS persons;
  CREATE TABLE persons(id INTEGER PRIMARY KEY, name VARCHAR(30) NOT NULL, surname VARCHAR(30) NOT NULL, type VARCHAR(5) NOT NULL);
  INSERT INTO persons(name, surname, type) VALUES ('Michelle', 'Bachelet', '2');
  INSERT INTO persons(name, surname, type) VALUES ('Donald', 'Trump', '3');
  INSERT INTO persons(name, surname, type) VALUES ('Evo', 'Morales', '3');
  INSERT INTO persons(name, surname, type) VALUES ('Nicolás', 'Maduro', '3');
  INSERT INTO persons(name, surname, type) VALUES ('Mauricio', 'Macri', '1');
  INSERT INTO persons(name, surname, type) VALUES ('Angela', 'Merkel', '1');
  INSERT INTO persons(name, surname, type) VALUES ('Justin', 'Trudeau', '1');
  
  DROP TABLE IF EXISTS messages;
  CREATE TABLE messages(id INTEGER PRIMARY KEY, text VARCHAR(255) NOT NULL);
  INSERT INTO messages(text) VALUES ('Whazzzzzuuuuuuuup!!!');