Context: CREATE TABLE table_17978052_2 (_number_s_lake_and_gnis_query_link INTEGER, borough_or_census_area VARCHAR)
Question: How many number of lakes are there in the Valdez-Cordova (CA) area?
Answer: SELECT MIN(_number_s_lake_and_gnis_query_link) FROM table_17978052_2 WHERE borough_or_census_area = "Valdez-Cordova (CA)"