Tell me the city of address "1913 Hanoi Way".
select t2.city from address as t1 join city as t2 on t1.city_id = t2.city_id where t1.address = "1913 hanoi Way"
What is the country of this address?
select t3.country from address as t1 join city as t2 on t1.city_id = t2.city_id join country as t3 on t2.country_id = t3.country_id where t1.address = "1913 hanoi Way"
And how many cities are there in Australia?
select count(*) from city as t1 join country as t2 on t1.country_id = t2.country_id where t2.country = 'Australia'