CREATE TABLE table_23158 ("Institution" TEXT, "Nickname" TEXT, "Location" TEXT, "Founded" FLOAT, "Type" TEXT, "Enrollment" FLOAT, "Joined" FLOAT, "Left" FLOAT, "Current Conference" TEXT)

What's the type of the school whose students are nicknamed Chargers?
SELECT "Type" FROM table_23158 WHERE "Nickname" = 'Chargers'
SELECT "Type" FROM "table_23158" WHERE "Nickname" = 'Chargers'