Question: when did home video game systems first become very popular
[{'answer': 'During the 1970s', 'provenance': [{'wikipedia_id': '32401', 'title': 'History of video games', 'start_paragraph_id': 2, 'start_character': 138, 'end_paragraph_id': 2, 'end_character': 154, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '32401', 'title': 'History of video games', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 800, 'bleu_score': 0.574265034173287, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18323331773537822476}, 'section': 'Section::::Abstract.'}]}]