Trick question. There was no Liga Sagres in 1996. Primeira Liga was referred to as Liga Sagres from 2008-2010, then Liga ZON Sagres until the 2013-2014 season. The winner of the Portuguese Primeira Liga in 1996 was FC Porto.
Benfica were winners of the Portuguese Liga Sagres in 1958.
The winners of the Portuguese Liga Sagres in 1945 were Belenenses.
Porto were the winners of the Portuguese Liga Sagres in 1956.
Benfica were the winners of the Portuguese Liga Sagres in 1957.
Belenenses were winners of the Portuguese Liga Sagres in 1959.
Benfica were winners of the Portuguese Liga Sagres in 1961.
Benfica were winners of the Portuguese Liga Sagres in 1971.
Benfica were winners of the Portuguese Liga Sagres in 1969.
Benfica were winners of the Portuguese Liga Sagres in 1968.
Benfica were winners of the Portuguese Liga Sagres in 1986.
Benfica were the Portuguese Liga Sagres winners in 1935.
Benfica were the Portuguese Liga Sagres winners In 1936.