Question: who invented the symphonic poem (last name only)
[{'answer': 'composer Carl Loewe', 'provenance': [{'wikipedia_id': '148820', 'title': 'Symphonic poem', 'start_paragraph_id': 1, 'start_character': 307, 'end_paragraph_id': 1, 'end_character': 326, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '148820', 'title': 'Symphonic poem', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 446, 'bleu_score': 0.9383908431221111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7913734932200879859}, 'section': 'Section::::Abstract.'}]}]