Question: where does most of earths heat come from
[{'answer': 'radiogenic heat', 'provenance': [{'wikipedia_id': '41077022', 'title': "Earth's internal heat budget", 'start_paragraph_id': 1, 'start_character': 239, 'end_paragraph_id': 1, 'end_character': 254, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'primordial heat', 'provenance': [{'wikipedia_id': '41077022', 'title': "Earth's internal heat budget", 'start_paragraph_id': 1, 'start_character': 336, 'end_paragraph_id': 1, 'end_character': 351, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '41077022', 'title': "Earth's internal heat budget", 'start_paragraph_id': 1, 'start_character': 79, 'end_paragraph_id': 1, 'end_character': 394, 'bleu_score': 0.916705652864192, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4874607215670766616}, 'section': 'Section::::Abstract.'}]}]