Database: superhero (difficulty: simple)
Question: Identify the weakest attribute of the Captain America.
SQL: SELECT T3.attribute_name FROM superhero AS T1 INNER JOIN hero_attribute AS T2 ON T1.id = T2.hero_id INNER JOIN attribute AS T3 ON T2.attribute_id = T3.id WHERE T1.superhero_name = 'Captain America' ORDER BY T2.attribute_value ASC LIMIT 1