Question: what type of plate boundary is the aleutian islands
[{'answer': 'convergent plate boundary', 'provenance': [{'wikipedia_id': '1908498', 'title': 'Aleutian Trench', 'start_paragraph_id': 1, 'start_character': 70, 'end_paragraph_id': 1, 'end_character': 95, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1908498', 'title': 'Aleutian Trench', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 883, 'bleu_score': 0.955334305930818, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13572845212151132574}, 'section': 'Section::::Abstract.'}]}]