human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: District, Population, Area, Pop. Dens., No.of Settlements
###Question: How many settlements are in český krumlov (ck) with a population density higher than 38?
gpt
SELECT SUM No.of Settlements FROM table WHERE District = český krumlov (ck) AND Pop. Dens. > 38