Question: when did 7 of 9 appear on voyager
[{'answer': 'in seasons four through seven'}, {'provenance': [{'wikipedia_id': '97368', 'title': 'Seven of Nine', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 534, 'bleu_score': 0.846342894101581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17060606762100363621}, 'section': 'Section::::Abstract.'}]}]