Arranging of conventions; conducting of conventions; arranging of exhibitions for cultural purposes; arranging of exhibitions for educational purposes; arranging of exhibitions for entertainment purposes; conducting of exhibitions for amusement purposes; conducting of exhibitions for educational purposes; conducting of exhibitions for entertainment purposes; conducting of exhibitions for recreation purposes; organisation of exhibitions for cultural or educational purposes; organisation of exhibitions for entertainment purposes; arranging and conducting of conferences; arranging and conducting of workshops (training); arranging and conducting of seminars