Question: the radio waves which are received after reflection from ionosphere are called
[{'answer': 'skywave', 'provenance': [{'wikipedia_id': '276281', 'title': 'Skywave', 'start_paragraph_id': 1, 'start_character': 24, 'end_paragraph_id': 1, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '276281', 'title': 'Skywave', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 401, 'bleu_score': 0.9684940092844061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9785246285391146422}, 'section': 'Section::::Abstract.'}]}]