Question: which german company built the first aircraft to fly under turbojet power
[{'answer': 'Heinkel', 'provenance': [{'wikipedia_id': '364152', 'title': 'Heinkel He 178', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '364152', 'title': 'Heinkel He 178', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 395, 'bleu_score': 0.9712154609069981, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11167360944632843465}, 'section': 'Section::::Abstract.'}]}]