Question: when did robin appear in batman the animated series
[{'answer': 'the first season', 'provenance': [{'wikipedia_id': '8076363', 'title': 'Robin in other media', 'start_paragraph_id': 9, 'start_character': 663, 'end_paragraph_id': 9, 'end_character': 679, 'bleu_score': 1.0, 'section': 'Section::::Television.:Live-action.\n'}]}]