There are 3 people in an office, including 1 director, 1 deputy director, and 1 clerk. (1) The director understands Japanese; (2) Some do not understand Japanese; (3) Some understand Japanese. Only one of the above three judgments is true. ['Deputy Director understands Japanese.', 'Deputy director does not understand Japanese.', 'Director understands Japanese.', 'The director does not understand Japanese but the clerk understands Japanese.']