Question: what does the column in the periodic table mean
[{'answer': 'elements having similar chemical behaviours'}, {'provenance': [{'wikipedia_id': '23053', 'title': 'Periodic table', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 706, 'bleu_score': 0.525169882933071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13132393220241762419}, 'section': 'Section::::Abstract.'}]}]