CREATE TABLE table_name_94 (date VARCHAR(255), lot_no VARCHAR(255), boiler_type VARCHAR(255), built_at VARCHAR(255))
What year is the date when the boiler type is forward topfeed, the built at is Crewe, and lot number is less than 187?
    
SQL: SELECT COUNT(date) FROM table_name_94 WHERE boiler_type = "forward topfeed" AND built_at = "crewe" AND lot_no < 187