Imagine the following scenario: you are visiting the street carnival in Cologne, Germany for the first time. Fascinated by the colorful and imaginative costumes of the people around you, your gaze wanders from one exciting spot to the next: here a clown with a fancy dress, there a small boy masqueraded as Harry Potter. But not only visual cues capture your attention: over there a band starts to play the new hit of the year and the smell of fresh cookies from the right also revives your interest.
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