Table: t_stock_data
Columns: lt_nos
year
bldr
type
notes

Question: Bldr of mcw&f, and a Year smaller than 1927, and a LT Nos of 9820-9821 has what type?
SQL: SELECT "type" FROM t_stock_data WHERE "bldr" = 'mcw&f' AND "year" < 1927 AND "lt_nos" = '9820-9821'

Question: Bldr of mcw&f, and a Notes of "mv"; converted from steam stock, 1927, and a Year of 1920, and a LT Nos of 9716-9718 has what type?
SQL: SELECT "type" FROM t_stock_data WHERE "bldr" = 'mcw&f' AND "notes" = '"mv"; converted from steam stock, 1927' AND "year" = 1920 AND "lt_nos" = '9716-9718'