Question: second life is an example of​ a(n)
[{'answer': 'an online virtual world', 'provenance': [{'wikipedia_id': '589192', 'title': 'Second Life', 'start_paragraph_id': 1, 'start_character': 15, 'end_paragraph_id': 1, 'end_character': 38, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '589192', 'title': 'Second Life', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 487, 'bleu_score': 0.8105450178482341, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8922210253009116811}, 'section': 'Section::::Abstract.'}]}]