Question: east-west lines in the government rectangular survey system are known as
[{'answer': 'baseline', 'provenance': [{'wikipedia_id': '236747', 'title': 'Public Land Survey System', 'start_paragraph_id': 17, 'start_character': 122, 'end_paragraph_id': 17, 'end_character': 130, 'bleu_score': 1.0, 'section': 'Section::::History of the system.:Applying the system.\n'}]}, {'provenance': [{'wikipedia_id': '236747', 'title': 'Public Land Survey System', 'start_paragraph_id': 55, 'start_character': 0, 'end_paragraph_id': 55, 'end_character': 1693, 'bleu_score': 0.9638960037294081, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8467458976812681926}, 'section': 'Section::::Survey design and execution.:Survey design.\n'}]}]