Question: who was the leader of solidarity movement in poland
[{'answer': 'Lech Wałęsa', 'provenance': [{'wikipedia_id': '28869', 'title': 'Solidarity (Polish trade union)', 'start_paragraph_id': 1, 'start_character': 256, 'end_paragraph_id': 1, 'end_character': 267, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28869', 'title': 'Solidarity (Polish trade union)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 518, 'bleu_score': 0.662630145134506, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8783324942641471085}, 'section': 'Section::::Abstract.'}]}]