CREATE TABLE table_51115 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

What is the location of the match with chad armstrong as the opponent?
SELECT "Location" FROM table_51115 WHERE "Opponent" = 'chad armstrong'
SELECT "Location" FROM "table_51115" WHERE "Opponent" = 'chad armstrong'