Table: bullion_coins
Columns: country
name_of_bullion_coin
fineness
denominations_gold_weight
years_of_mintage

Question: How many catagories for denominations does Austria have? 
SQL: SELECT COUNT("denominations_gold_weight") FROM bullion_coins WHERE "country" = 'Austria'

Question: What are all the denominations for China?
SQL: SELECT "denominations_gold_weight" FROM bullion_coins WHERE "country" = 'China'