Question: who is credited with deriving the electronegativity values of the periodic table
[{'answer': 'Jöns Jacob Berzelius', 'provenance': [{'wikipedia_id': '9707', 'title': 'Electronegativity', 'start_paragraph_id': 4, 'start_character': 47, 'end_paragraph_id': 4, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9707', 'title': 'Electronegativity', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 618, 'bleu_score': 0.7612934896156901, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2658198244759080230}, 'section': 'Section::::Abstract.'}]}]