Database: superhero (difficulty: simple)
Question: Provide the hair colour of the Alien superhero who is 185 cm tall.
SQL: SELECT DISTINCT T3.colour FROM superhero AS T1 INNER JOIN race AS T2 ON T1.race_id = T2.id INNER JOIN colour AS T3 ON T1.hair_colour_id = T3.id WHERE T1.height_cm = 185 AND T2.race = 'Alien'