Question: what type of plate boundary does iceland lie on
[{'answer': 'constructive', 'provenance': [{'wikipedia_id': '64579', 'title': 'Geography of Iceland', 'start_paragraph_id': 1, 'start_character': 162, 'end_paragraph_id': 1, 'end_character': 174, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '64579', 'title': 'Geography of Iceland', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 474, 'bleu_score': 0.826428515368669, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18153198441297462221}, 'section': 'Section::::Abstract.'}]}]