Table: race_results_1909
Columns: year
date
driver_rider
car_motorcycle
time
speed

Question: What car/motorcycle goes 91.813mph?
SQL: SELECT "car_motorcycle" FROM race_results_1909 WHERE "speed" = '91.813mph'

Question: Which driver is Indian?
SQL: SELECT "driver_rider" FROM race_results_1909 WHERE "car_motorcycle" = 'indian'