SELECT copa_libertadores_1992 FROM table_name_59 WHERE supercopa_sudamericana_1992 = "round of 16" AND team = "grêmio"
Copa Libertadores tahun 1992 mana yang memiliki Piala Super Sudamericana 1992 dari Round of 16, dan tim Grêmio?
CREATE TABLE table_name_59 (copa_libertadores_1992 VARCHAR, supercopa_sudamericana_1992 VARCHAR, team VARCHAR)