Context: CREATE TABLE architect (Id VARCHAR); CREATE TABLE mill (name VARCHAR, architect_id VARCHAR); CREATE TABLE bridge (architect_id VARCHAR, length_meters INTEGER)
Question: What are the distinct name of the mills built by the architects who have also built a bridge longer than 80 meters?
Answer: SELECT DISTINCT T1.name FROM mill AS T1 JOIN architect AS t2 ON T1.architect_id = T2.id JOIN bridge AS T3 ON T3.architect_id = T2.id WHERE T3.length_meters > 80