Name the copa libertadores 1992 for round of 16 and team of fluminense
create table table_15013825_8 (copa_libertadores_1992 varchar, copa_conmebol_1992 varchar, team varchar, PRIMARY KEY (copa_libertadores_1992))
select copa_libertadores_1992 from table_15013825_8 where copa_conmebol_1992 = "round of 16" and team = "fluminense"