Question: what are the names of the two hills that the pilgrims visit
[{'answer': 'Safa', 'provenance': [{'wikipedia_id': '40264196', 'title': 'Great Mosque of Mecca', 'start_paragraph_id': 1, 'start_character': 536, 'end_paragraph_id': 1, 'end_character': 540, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Marwah', 'provenance': [{'wikipedia_id': '40264196', 'title': 'Great Mosque of Mecca', 'start_paragraph_id': 17, 'start_character': 256, 'end_paragraph_id': 17, 'end_character': 262, 'bleu_score': 1.0, 'section': 'Section::::History.:Saudi era.:First Saudi expansion.\n'}]}, {'provenance': [{'wikipedia_id': '40264196', 'title': 'Great Mosque of Mecca', 'start_paragraph_id': 42, 'start_character': 0, 'end_paragraph_id': 42, 'end_character': 208, 'bleu_score': 0.9466178497997021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2810154817349150981}, 'section': 'Section::::Pilgrimage.\n'}]}]