I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "CAMRA maintains a "National Inventory" of historical notability and of architecturally and decoratively notable pubs. The National Trust owns thirty-six public houses of historic interest including the George Inn, Southwark, London and The Crown Liquor Saloon, Belfast, Northern Ireland."? 

The Crown Liquor Saloon is significant because of what reason?