Table: bus_data
Columns: year
make_model
length
engine_type
numbers

Question: What is the length for years 2012-2013?
SQL: SELECT "length" FROM bus_data WHERE "year" = '2012-2013'

Question: If length is ft (m) with numbers of 6600-6684 (84 buses) for 2003, what is the engine type?
SQL: SELECT "engine_type" FROM bus_data WHERE "length" = 'ft (m)' AND "year" = '2003' AND "numbers" = '6600-6684 (84 buses)'

Question: For numbers of 2600-2825 (223 buses), what is the length?
SQL: SELECT "length" FROM bus_data WHERE "numbers" = '2600-2825 (223 buses)'

Question: What is the lenth of a 2003 Make & Model of nabi 35-lfw?
SQL: SELECT "length" FROM bus_data WHERE "year" = '2003' AND "make_model" = 'nabi 35-lfw'

Question: What is the length for a diesel engine with numbers of tbd (13 buses)?
SQL: SELECT "length" FROM bus_data WHERE "engine_type" = 'diesel' AND "numbers" = 'tbd (13 buses)'

Question: What year has a make & model of mci d4000n?
SQL: SELECT "year" FROM bus_data WHERE "make_model" = 'mci d4000n'