Question: when was the first synthetic blood approved for human use
[{'answer': '1989', 'provenance': [{'wikipedia_id': '415016', 'title': 'Blood substitute', 'start_paragraph_id': 10, 'start_character': 209, 'end_paragraph_id': 10, 'end_character': 213, 'bleu_score': 1.0, 'section': 'Section::::Approaches.\n'}]}, {'provenance': [{'wikipedia_id': '415016', 'title': 'Blood substitute', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 450, 'bleu_score': 0.9247765631544721, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12759276622097225142}, 'section': 'Section::::Approaches.\n'}]}]