Question: who is announcing tonight's world series game
[{'answer': 'Joe Buck', 'provenance': [{'wikipedia_id': '2941848', 'title': 'List of World Series broadcasters', 'start_paragraph_id': 3, 'start_character': 233, 'end_paragraph_id': 3, 'end_character': 241, 'bleu_score': 1.0, 'section': 'Section::::Television.\n'}]}]