Question: when did the video game rating system start
[{'answer': '1994', 'provenance': [{'wikipedia_id': '169836', 'title': 'Entertainment Software Rating Board', 'start_paragraph_id': 1, 'start_character': 181, 'end_paragraph_id': 1, 'end_character': 185, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '169836', 'title': 'Entertainment Software Rating Board', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 381, 'bleu_score': 0.962600167205617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12366461869969034166}, 'section': 'Section::::Abstract.'}]}]