Question: what is the meaning of lc in banking
[{'answer': 'letter of credit', 'provenance': [{'wikipedia_id': '844265', 'title': 'Letter of credit', 'start_paragraph_id': 1, 'start_character': 2, 'end_paragraph_id': 1, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]