 What was on exhibit in the Groacian parade?
An elaborate one picked out in pinkish paint seemed to indicate the Groacian equivalent of a bar. A Groacian bartender was dispensing clay pots of alcoholic drink from the bar-pit at the center of the room. Retief backed, rounded a corner into a narrow alley-like passage, deserted, silent ... except for the following Groacian. Two Groaci wearing heavy eye-shields and elaborate crest ornaments indicative of rank rose as Retief entered the room. I understand that a Terrestrial task force stood off Groac and sent a delegation down to ask questions. It was just after the task force paid its visit, and before the arrival of the first Terrestrial diplomatic mission." After being securely caged, they were exhibited to the gentle Groaci public.
 people they had taken as prisoners
 Groacian government officials  people they had taken as prisoners  animals from all over the galaxy  people visiting from Earth