human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Class, Number(s), Quantity, Year(s) of Manufacture, Type
###Question: Which Quantity has a Type of e h4v, and a Year(s) of Manufacture of 1920–1924?
gpt
SELECT MIN Quantity FROM table WHERE Type = e h4v AND Year(s) of Manufacture = 1920–1924