Question: the himalayan mountains represent what type of plate tectonic boundary
[{'answer': 'convergent boundary', 'provenance': [{'wikipedia_id': '254443', 'title': 'Convergent boundary', 'start_paragraph_id': 1, 'start_character': 2, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]