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SELECT (1, 2) IN ( (3, 4), (5, 6), (1, 3) ); SELECT (1, 2) IN ( (3, 4), (5, 6), (1, 2) ); SELECT (1, 2) IN ( (3, 2) ); SELECT (1, 2) IN ( (1, 2) ); SELECT (1, 2) IN ( ); SELECT (1, 2) NOT IN ( );