Table: 1983 australian drivers' championship
[['round', 'circuit', 'location / state', 'date', 'winner'], ['rd 1', 'adelaide international raceway', 'adelaide , south australia', '10 july', 'alfredo costanzo'], ['rd 2', 'lakeside', 'brisbane , queensland', '23 july', 'andrew miedecke'], ['rd 3', 'oran park', 'sydney , new south wales', '21 august', 'alfredo costanzo'], ['rd 4', 'sandown park', 'melbourne , victoria', '11 september', 'alfredo costanzo'], ['rd 5', 'winton', 'benalla , victoria', '16 october', 'alfredo costanzo'], ['rd 6', 'calder park', 'melbourne , victoria', '13 november', 'john smith']]
Statement: there were 6 Round in the 1983 Australian Drivers' Championship
Statement: on 23 July at Brisbane , Queensland , Andrew Miedecke was the Winner
Statement: Rd 1 was held at Adelaide International Raceway adelaide , South Australia
Statement: Alfredo Costanzo won the most race with 4 win on Round 1 , Round 3 , Round 4 , and Round 5
Statement: the only Round held in Sydney was Rd 3 at Oran Park