Question: who played richie on new adventures of old christine
[{'answer': 'Trevor Gagnon', 'provenance': [{'wikipedia_id': '30855188', 'title': 'The New Adventures of Old Christine', 'start_paragraph_id': 5, 'start_character': 38, 'end_paragraph_id': 5, 'end_character': 51, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '30855188', 'title': 'The New Adventures of Old Christine', 'start_paragraph_id': 21, 'start_character': 0, 'end_paragraph_id': 21, 'end_character': 282, 'bleu_score': 0.9560167778278961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5779185718402436344}, 'section': 'Section::::Cast and characters.:Main cast.\n'}]}]