CREATE TABLE table_50298 ("Player" CLOB, "Nationality" CLOB, "Position" CLOB, "Years for Grizzlies" CLOB, "School/Club Team" CLOB)

What team is from the United States and plays a guard position for the Grizzlies in 2012?
SELECT "School/Club Team" FROM table_50298 WHERE "Nationality" = 'united states' AND "Position" = 'guard' AND "Years for Grizzlies" = '2012'
SELECT "School/Club Team" FROM "table_50298" WHERE "Nationality" = 'united states' AND "Position" = 'guard' AND "Years for Grizzlies" = '2012'