DEFINE SCHEMA ATTENDEES DESCRIPTION 'Employees who attended the training session' ( ATTENDEE_NAME CHAR(24), TRAINING_FEEBACK VARCHAR(256) ); DEFINE SCHEMA ABSENTEES DESCRIPTION 'Employees who failed to attend the training session' ( ABSENTEE_NAME CHAR(24), EXCUSE VARCHAR(256) ); DEFINE SCHEMA PRESENTERS DESCRIPTION 'Employees who gave presentations at the training session' ( PRESENTER_NAME CHAR(24), PRESENTATION_TOPIC VARCHAR(128) );