Tell me the country of the league named "France Ligue 1".
select t1.name from country as t1 join league as t2 on t1.id = t2.country_id where t2.name = "France ligue 1"
How about that of the league named "Poland Ekstraklasa"
select t1.name from country as t1 join league as t2 on t1.id = t2.country_id where t2.name = "Poland Ekstraklasa"
How many leagues are there in England?
select count(*) from country as t1 join league as t2 on t1.id = t2.country_id where t1.name = "England"