CREATE TABLE table_46759 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "Class" TEXT, "FCC info" TEXT)

What was the call sign for ERP W of 99?
SELECT "Call sign" FROM table_46759 WHERE "ERP W" = '99'
SELECT "Call sign" FROM "table_46759" WHERE "ERP W" = '99'