human
Schema:
roller_coaster (Roller_Coaster_ID, Name, Park, Country_ID, Length, Height, Speed, Opened, Status)
country (Country_ID, Name, Population, Area, Languages)
Please answer with SQL.
assistant
Sure, I understand.
human
How fast are roller coasters in Austria?
assistant
SELECT T2.Speed FROM country AS T1 JOIN roller_coaster AS T2 ON T1.Country_ID = T2.Country_ID WHERE T1.Name = "Austria" ;