1) Αναπαράσταση ενός κόσμου 2) Απάντηση σε ερωτήσεις 3) Δένδρο Εκτέλεσης Ερωτήματος 4) Ενσωμάτωση Κανόνων 5) Ενσωμάτωση Αναδρομικών Κανόνων

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