CREATE TABLE table_name_51 (image NUMBER, harrison VARCHAR2, ashmolean VARCHAR2)

What is the lowest image with a 20w Harrison, and less than 20 for Ashmolean?
SELECT MIN(image) FROM table_name_51 WHERE harrison = "20w" AND ashmolean < 20
SELECT MIN("image") FROM "table_name_51" WHERE "20w" = "harrison" AND "ashmolean" < 20