Question: when did journey get a new lead singer
[{'answer': '1977', 'provenance': [{'wikipedia_id': '161356', 'title': 'Journey (band)', 'start_paragraph_id': 9, 'start_character': 11, 'end_paragraph_id': 9, 'end_character': 15, 'bleu_score': 1.0, 'section': 'Section::::History.:1973–1976: Formation, "Journey", and "Look into the Future".\n'}]}, {'provenance': [{'wikipedia_id': '161356', 'title': 'Journey (band)', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 537, 'bleu_score': 0.7845850870042791, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4396998634972187741}, 'section': 'Section::::History.:1977–1980: New musical direction, "Next", "Infinity", and "Evolution".\n'}]}]