Who was the longest serving U.S. president?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q30', 'id': 0, 'label': 'United States of America'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q181574', 'id': 1, 'label': 'North American Free Trade Agreement'}], 'links': [{'name_': 'P17', 'source': 0, 'target': 0, 'label': 'country'}, {'name_': 'P463', 'source': 0, 'target': 1, 'label': 'member of'}, {'name_': 'P527', 'source': 1, 'target': 0, 'label': 'has part(s)'}]}
The United States of America is a member of the North American Free Trade Agreement.
The United States of America is a country which is a member of the North American Free Trade Agreement which is part of the U.S.A .
Who was the longest serving U.S. president?</s>The United States of America is a member of the [unused1]North American Free Trade Agreement                [unused2] .
Who was the longest serving U.S. president?</s>The United States of America is a member of the North American Free Trade Agreement.
Who was the longest serving U.S. president?</s>The United States of America is a country which is a member of the [unused1]North American Free Trade Agreement                [unused2] which is part of the U.S.A .
Who was the longest serving U.S. president?</s>The United States of America is a country which is a member of the North American Free Trade Agreement which is part of the U.S.A .
Who was the longest serving U.S. president?</s>United States of America,country,United States of America,United States of America,member of,[unused1]North American Free Trade Agreement[unused2],[unused1]North American Free Trade Agreement[unused2],has part(s),United States of America,[unused1]North American Free Trade Agreement[unused2],0,[unused1]North American Free Trade Agreement[unused2]
Who was the longest serving U.S. president?</s>United States of America,country,United States of America,United States of America,member of,North American Free Trade Agreement,North American Free Trade Agreement,has part(s),United States of America,North American Free Trade Agreement,0,North American Free Trade Agreement