CREATE TABLE table_75355 ("Call sign" CLOB, "Frequency MHz" FLOAT, "City of license" CLOB, "ERP W" FLOAT, "Class" CLOB, "FCC info" CLOB)

What is the call sign of the translator in Spring Valley, Nevada?
SELECT "Call sign" FROM table_75355 WHERE "City of license" = 'spring valley, nevada'
SELECT "Call sign" FROM "table_75355" WHERE "City of license" = 'spring valley, nevada'