Question: who gave the first working definition of an element
[{'answer': 'English physicist Henry Moseley', 'provenance': [{'wikipedia_id': '5659', 'title': 'Chemical element', 'start_paragraph_id': 101, 'start_character': 22, 'end_paragraph_id': 101, 'end_character': 53, 'bleu_score': 1.0, 'section': 'Section::::History.:Evolving definitions.:Atomic definitions.\n'}]}, {'provenance': [{'wikipedia_id': '5659', 'title': 'Chemical element', 'start_paragraph_id': 101, 'start_character': 0, 'end_paragraph_id': 101, 'end_character': 763, 'bleu_score': 0.983804329702269, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16164996167202958976}, 'section': 'Section::::History.:Evolving definitions.:Atomic definitions.\n'}]}]