Question: where did the term blue jeans come from
[{'answer': 'blue - colored denim', 'provenance': [{'wikipedia_id': '56444', 'title': 'Jeans', 'start_paragraph_id': 1, 'start_character': 489, 'end_paragraph_id': 1, 'end_character': 508, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '56444', 'title': 'Jeans', 'start_paragraph_id': 1, 'start_character': 65, 'end_paragraph_id': 1, 'end_character': 1152, 'bleu_score': 0.7950926641410231, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16932493035171348950}, 'section': 'Section::::Abstract.'}]}]