Question: who is the actress who plays po on teletubbies
[{'answer': 'Pui Fan Lee', 'provenance': [{'wikipedia_id': '2431924', 'title': 'Pui Fan Lee', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2431924', 'title': 'Pui Fan Lee', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 473, 'bleu_score': 0.940033794885305, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2972856570076618117}, 'section': 'Section::::Abstract.'}]}]