Question: who made first synthetic plastic in the world
[{'answer': 'Alexander Parkes', 'provenance': [{'wikipedia_id': '26145195', 'title': 'Plastic', 'start_paragraph_id': 80, 'start_character': 106, 'end_paragraph_id': 80, 'end_character': 122, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '26145195', 'title': 'Plastic', 'start_paragraph_id': 80, 'start_character': 0, 'end_paragraph_id': 80, 'end_character': 680, 'bleu_score': 0.9817332376369081, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 70099543107329186}, 'section': 'Section::::History.\n'}]}]