Question: what is melted rock (magma) called when it reaches the earth's surface
[{'answer': 'lava', 'provenance': [{'wikipedia_id': '37508', 'title': 'Magma', 'start_paragraph_id': 1, 'start_character': 1115, 'end_paragraph_id': 1, 'end_character': 1119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]