แบบแผนการแก้ไขของฟิลด์ 'trimmers and stokers' คืออะไร?
What  was the revising convention of the field 'trimmers and stokers'?
df = pd.DataFrame(columns=['revising_convention_s_', 'field'])
df.loc[df['field'] == 'trimmers and stokers', 'revising_convention_s_']