Question: what groups of elements does the d-block contain
[{'answer': 'the transition metals', 'provenance': [{'wikipedia_id': '33563967', 'title': 'Block (periodic table)', 'start_paragraph_id': 4, 'start_character': 271, 'end_paragraph_id': 4, 'end_character': 292, 'bleu_score': 1.0, 'section': 'Section::::Characteristics.\n'}]}, {'provenance': [{'wikipedia_id': '33563967', 'title': 'Block (periodic table)', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 399, 'bleu_score': 0.9716239638199891, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9025417692996290620}, 'section': 'Section::::Characteristics.:d-block.\n'}]}]