Question: where is the starting meridian for the longitude system
[{'answer': 'North Pole', 'provenance': [{'wikipedia_id': '50225', 'title': 'Prime meridian', 'start_paragraph_id': 22, 'start_character': 26, 'end_paragraph_id': 22, 'end_character': 36, 'bleu_score': 1.0, 'section': 'Section::::International prime meridian.:IERS Reference Meridian.:List of places.\n'}]}, {'provenance': [{'wikipedia_id': '50225', 'title': 'Prime meridian', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 129, 'bleu_score': 0.9146912192286941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18015427702662996682}, 'section': 'Section::::International prime meridian.:IERS Reference Meridian.:List of places.\n'}]}]