Table: gwr_steam_rail_motors
Columns: diagram_s
quantity
numbers
completed
length

Question: What are the numbers for the item completed earlier than 1904?
SQL: SELECT "numbers" FROM gwr_steam_rail_motors WHERE "completed" < 1904

Question: For the item with more than 10, and numbers of 53-58, 61-72, what is the lowest completed?
SQL: SELECT MIN("completed") FROM gwr_steam_rail_motors WHERE "quantity" > 10 AND "numbers" = '53-58, 61-72'

Question: What is the quantity of the item with the numbers of 29-36?
SQL: SELECT AVG("quantity") FROM gwr_steam_rail_motors WHERE "numbers" = '29-36'