Question: why is the texas flag called the lone star flag
[{'answer': 'its prominent single white star', 'provenance': [{'wikipedia_id': '310192', 'title': 'Flag of Texas', 'start_paragraph_id': 1, 'start_character': 88, 'end_paragraph_id': 1, 'end_character': 119, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '310192', 'title': 'Flag of Texas', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 420, 'bleu_score': 0.974188104609039, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16847090773398042527}, 'section': 'Section::::Abstract.'}]}]