Question: who is the father of emma on friends
[{'answer': 'Ross', 'provenance': [{'wikipedia_id': '27716091', 'title': 'Friends (season 8)', 'start_paragraph_id': 11, 'start_character': 31, 'end_paragraph_id': 11, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::Cast and characters.:Main cast.\n'}]}]