Table: t_1952_f1_race
Columns: race_name
circuit
date
winning_driver
constructor
report

Question: How many winners did I Dessau Autobahnspinne have?
SQL: SELECT COUNT("winning_driver") FROM t_1952_f1_race WHERE "race_name" = 'I Dessau Autobahnspinne'

Question: What is the date on which a race was run at Halle-Saale-Schleife circuit?
SQL: SELECT "date" FROM t_1952_f1_race WHERE "circuit" = 'Halle-Saale-Schleife'

Question: How many races take place in Dessau circuit?
SQL: SELECT COUNT("race_name") FROM t_1952_f1_race WHERE "circuit" = 'Dessau'

Question: Which races did Paul Greifzu win?
SQL: SELECT "race_name" FROM t_1952_f1_race WHERE "winning_driver" = 'Paul Greifzu'