user: Question: What is the first locomotive that has a SLM number lower than 924?
Columns: ['Built', 'Number', 'Type', 'SLM Number', 'Wheel arrangement', 'Location', 'Notes']
Types: ['real', 'real', 'text', 'real', 'text', 'text', 'text']
Sample row: [1895.0, 1.0, 'Mountain Railway Rack Steam Locomotive', 923.0, '0-4-2 T', 'Snowdon Mountain Railway', '“L.A.D.A.S”']
SQL:

assistant: SELECT MIN("Number") FROM "Table" WHERE "SLM Number" < 924.0;