Question: what type of energy do satellites generally use to communicate with earth
[{'answer': 'radio and microwave frequencies', 'provenance': [{'wikipedia_id': '45207', 'title': 'Communications satellite', 'start_paragraph_id': 2, 'start_character': 347, 'end_paragraph_id': 2, 'end_character': 378, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'electromagnetic waves'}, {'provenance': [{'wikipedia_id': '45207', 'title': 'Communications satellite', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 601, 'bleu_score': 0.7692469638154781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7028821236510454391}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '45207', 'title': 'Communications satellite', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7028821236510454391}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '45207', 'title': 'Communications satellite', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ['The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points. Communications satellites use a wide range of radio and microwave frequencies.', 'Communications satellites use a wide range of radio and microwave frequencies', 'The purpose of communications satellites is to relay the signal around the curve of the Earth allowing communication between widely separated geographical points. Communications satellites use a wide range of radio and microwave frequencies.']}}]}]