Question: which internet web portal changed its name to altaba inc
[{'answer': 'Yahoo ! Inc', 'provenance': [{'wikipedia_id': '52823194', 'title': 'Altaba', 'start_paragraph_id': 3, 'start_character': 22, 'end_paragraph_id': 3, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '52823194', 'title': 'Altaba', 'start_paragraph_id': 1, 'start_character': 56, 'end_paragraph_id': 1, 'end_character': 578, 'bleu_score': 0.706965931173077, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12866305762350096372}, 'section': 'Section::::Abstract.'}]}]