CREATE TABLE table_34780 ("County" TEXT, "Monument name" TEXT, "Year built" FLOAT, "City or Town" TEXT, "Latitude" TEXT, "Longitude" TEXT)

What Monument was built after 1887 in Warren County?
SELECT "Monument name" FROM table_34780 WHERE "Year built" > '1887' AND "County" = 'warren'
SELECT "Monument name" FROM "table_34780" WHERE "County" = 'warren' AND "Year built" > '1887'