Question: what are two major cities in el salvador
[{'answer': 'San Salvador', 'provenance': [{'wikipedia_id': '9356', 'title': 'El Salvador', 'start_paragraph_id': 1, 'start_character': 329, 'end_paragraph_id': 1, 'end_character': 341, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Santa Ana', 'provenance': [{'wikipedia_id': '9356', 'title': 'El Salvador', 'start_paragraph_id': 83, 'start_character': 96, 'end_paragraph_id': 83, 'end_character': 105, 'bleu_score': 1.0, 'section': 'Section::::Geography.:Natural disasters.:Earthquakes and volcanic activity.\n'}]}]