Table: ntl_championships_history
Columns: year
men_s_open
women_s_open
mixed_open
men_s_u20
women_s_u20
senior_mixed
men_s_30
women_s_30
men_s_35
women_s_35
men_s_40
women_s_40
men_s_45
men_s_50

Question: Which Men's 35 has a Women's Open of brisbane city cobras def hunter western hornets?
SQL: SELECT "men_s_35" FROM ntl_championships_history WHERE "women_s_open" = 'brisbane city cobras def hunter western hornets'

Question: Which Men's 50 has a Senior Mixed of n/A, and a Men's Open of gold coast sharks def sydney mets, and a Men's 30 of sydney mets def sydney scorpions, and a Women's u20 of southern suns def brisbane city cobras?
SQL: SELECT "men_s_50" FROM ntl_championships_history WHERE "senior_mixed" = 'n/a' AND "men_s_open" = 'gold coast sharks def sydney mets' AND "men_s_30" = 'sydney mets def sydney scorpions' AND "women_s_u20" = 'southern suns def brisbane city cobras'

Question: Which Women's 35 has a Men's 50 of n/A, and a Men's 40 of southern suns def sunwest razorbacks?
SQL: SELECT "women_s_35" FROM ntl_championships_history WHERE "men_s_50" = 'n/a' AND "men_s_40" = 'southern suns def sunwest razorbacks'

Question: Which Men's u20 has a Men's 45 of n/A?
SQL: SELECT "men_s_u20" FROM ntl_championships_history WHERE "men_s_45" = 'n/a'

Question: How many years have a Women's Open of brisbane city cobras def sydney mets, and a Men's 35 of n/A?
SQL: SELECT COUNT("year") FROM ntl_championships_history WHERE "women_s_open" = 'brisbane city cobras def sydney mets' AND "men_s_35" = 'n/a'