Question: how long did it take most immigrants to pass through ellis island
[{'answer': 'two to five hours', 'provenance': [{'wikipedia_id': '9806', 'title': 'Ellis Island', 'start_paragraph_id': 130, 'start_character': 116, 'end_paragraph_id': 130, 'end_character': 133, 'bleu_score': 1.0, 'section': 'Section::::Immigration procedures.:Primary inspection.:Interviews.\n'}]}]