user: Question: Which Copa Libertadores 1992 has a Supercopa Sudamericana 1992 of Round of 16, and a Team of Grêmio?
Columns: ['Team', 'Copa Libertadores 1992', 'Supercopa Sudamericana 1992', 'Copa CONMEBOL 1992', 'Recopa Sudamericana 1992', 'Intercontinental Cup 1992']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Atlético Mineiro', 'Did not qualify', 'Did not qualify', 'Champions', 'N/A', 'N/A']
SQL:

assistant: SELECT "Copa Libertadores 1992" FROM "Table" WHERE "Supercopa Sudamericana 1992" = 'Round of 16' AND "Team" = 'Grêmio';