Table: tramway_inventory
Columns: class
quantity
manufacturer
motor
seats

Question: Which motor's quantity was more than 8, and a class of bs 1915?
SQL: SELECT "motor" FROM tramway_inventory WHERE "quantity" > 8 AND "class" = 'bs 1915'

Question: Which motor's class was bs 1910?
SQL: SELECT "motor" FROM tramway_inventory WHERE "class" = 'bs 1910'

Question: What is the quantity when the seats number was 16 and the class was kss 1913?
SQL: SELECT "quantity" FROM tramway_inventory WHERE "seats" = 16 AND "class" = 'kss 1913'