Database: superhero (difficulty: simple)
Question: Identify the gender of the superhero who has the ability of Intelligence.
SQL: SELECT T4.gender FROM superhero AS T1 INNER JOIN hero_power AS T2 ON T1.id = T2.hero_id INNER JOIN superpower AS T3 ON T2.power_id = T3.id INNER JOIN gender AS T4 ON T1.gender_id = T4.id WHERE T3.power_name = 'Intelligence'