Question: when was the united federation of planets formed
[{'answer': '2161', 'provenance': [{'wikipedia_id': '55312', 'title': 'United Federation of Planets', 'start_paragraph_id': 12, 'start_character': 42, 'end_paragraph_id': 12, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::In-universe portrayal.:The organization of the Federation.\n'}]}]