Question: what are the major landforms in the canadian shield
[{'answer': 'Laurentian Upland', 'provenance': [{'wikipedia_id': '6230', 'title': 'Canadian Shield', 'start_paragraph_id': 3, 'start_character': 105, 'end_paragraph_id': 3, 'end_character': 122, 'bleu_score': 1.0, 'section': 'Section::::Geographical extent.\n'}]}, {'answer': 'Kazan Region', 'provenance': [{'wikipedia_id': '6230', 'title': 'Canadian Shield', 'start_paragraph_id': 3, 'start_character': 124, 'end_paragraph_id': 3, 'end_character': 136, 'bleu_score': 1.0, 'section': 'Section::::Geographical extent.\n'}]}, {'answer': 'Davis', 'provenance': [{'wikipedia_id': '6230', 'title': 'Canadian Shield', 'start_paragraph_id': 3, 'start_character': 138, 'end_paragraph_id': 3, 'end_character': 143, 'bleu_score': 1.0, 'section': 'Section::::Geographical extent.\n'}]}, {'answer': 'Hudson', 'provenance': [{'wikipedia_id': '6230', 'title': 'Canadian Shield', 'start_paragraph_id': 3, 'start_character': 145, 'end_paragraph_id': 3, 'end_character': 151, 'bleu_score': 1.0, 'section': 'Section::::Geographical extent.\n'}]}, {'answer': 'James', 'provenance': [{'wikipedia_id': '6230', 'title': 'Canadian Shield', 'start_paragraph_id': 3, 'start_character': 156, 'end_paragraph_id': 3, 'end_character': 161, 'bleu_score': 1.0, 'section': 'Section::::Geographical extent.\n'}]}, {'provenance': [{'wikipedia_id': '6230', 'title': 'Canadian Shield', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 685, 'bleu_score': 0.9583546176158331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7239680152952945912}, 'section': 'Section::::Geographical extent.\n'}]}]