CREATE TABLE table_203_502 (id DECIMAL, "team" TEXT, "titles" DECIMAL, "runner-up" DECIMAL, "third place" DECIMAL, "fourth place" DECIMAL, "years participated" DECIMAL)

which team has the most titles at the great lakes invitational ?
SELECT "team" FROM table_203_502 ORDER BY "titles" DESC LIMIT 1
SELECT "team" FROM "table_203_502" ORDER BY "titles" DESC NULLS LAST LIMIT 1