Question: when did mcdonald's start saying i'm lovin it
[{'answer': '2003', 'provenance': [{'wikipedia_id': '411413', 'title': "McDonald's advertising", 'start_paragraph_id': 13, 'start_character': 3, 'end_paragraph_id': 13, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::History.:Controversies.\n'}]}, {'provenance': [{'wikipedia_id': '411413', 'title': "McDonald's advertising", 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 1785, 'bleu_score': 0.944326415695639, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9102528004033891695}, 'section': 'Section::::Current campaign.\n'}]}]