date released                institute social democratic       socialist green - communist democratic renewal democratic and social centre           lead
0    july 19 , 1987         election results   50.2% 148 seats  22.2% 60 seats    12.1% 31 seats       4.9% 7 seats                 4.4% 4 seats          28.0%
1    july 19 , 1987         exit poll - rtp1     48.0% - 50.0%   21.0% - 23.0%     12.5% - 14.5%        5.0% - 7.0%                  3.0% - 5.0%          27.0%
2    july 19 , 1987      exit poll - antena1     45.0% - 47.0%   24.0% - 25.0%                 -                  -                            -  21.0% - 22.0%
3    july 17 , 1987  euroexpansão / expresso     41.0% - 44.0%   22.0% - 25.0%     13.0% - 15.0%      11.0% - 14.0%                  4.0% - 6.0%          19.0%
4  october 6 , 1985         election results    29.9% 88 seats  20.8% 57 seats    15.5% 38 seats     17.9% 45 seats               10.0% 22 seats           9.1%

Table as JSON:
{"date released":{"0":"july 19 , 1987","1":"july 19 , 1987","2":"july 19 , 1987","3":"july 17 , 1987","4":"october 6 , 1985"},"institute":{"0":"election results","1":"exit poll - rtp1","2":"exit poll - antena1","3":"euroexpansão \/ expresso","4":"election results"},"social democratic":{"0":"50.2% 148 seats","1":"48.0% - 50.0%","2":"45.0% - 47.0%","3":"41.0% - 44.0%","4":"29.9% 88 seats"},"socialist":{"0":"22.2% 60 seats","1":"21.0% - 23.0%","2":"24.0% - 25.0%","3":"22.0% - 25.0%","4":"20.8% 57 seats"},"green - communist":{"0":"12.1% 31 seats","1":"12.5% - 14.5%","2":"-","3":"13.0% - 15.0%","4":"15.5% 38 seats"},"democratic renewal":{"0":"4.9% 7 seats","1":"5.0% - 7.0%","2":"-","3":"11.0% - 14.0%","4":"17.9% 45 seats"},"democratic and social centre":{"0":"4.4% 4 seats","1":"3.0% - 5.0%","2":"-","3":"4.0% - 6.0%","4":"10.0% 22 seats"},"lead":{"0":"28.0%","1":"27.0%","2":"21.0% - 22.0%","3":"19.0%","4":"9.1%"}}