polling firm                      date        link             psoe         others        lead
0                         election results         october 29 , 1989        html        39.6% 175       12.6% 19       13.8%
1                               exit polls                exit polls  exit polls       exit polls     exit polls  exit polls
2                                sigma dos                october 23        html            - 168           - 23           -
3                             icp research           october 16 - 19        html      - 174 - 178      - 25 - 26           -
4                                    opina           october 16 - 18        html  41.5% 172 - 178  15.0% 18 - 27       16.5%
5                                      iif           october 16 - 17        html      - 173 - 183      - 18 - 23           -
6                               demoscopia            october 9 - 15        html  41.6% 176 - 182      - 17 - 23       18.8%
7                                    opina            october 7 - 11        html  41.0% 172 - 178  12.4% 18 - 24       17.0%
8                                     psoe                 october 5        html      - 175 - 185              -           -
9                                  el país                 october 5        html            - 176              -           -
10                                     cis                 october 5        html  43.0% 178 - 180              -       22.0%
11                              metra seis         september 19 - 22        html      - 172 - 179      - 26 - 28           -
12  european election (seat extrapolation)            june 15 , 1989        html        39.6% 186       21.5% 28       18.2%
13                                   opina                    june 4        html            36.1%          17.3%       13.7%
14                                   opina           january 17 - 18        html            37.9%          13.0%       14.8%
15                                    1989                      1989        1989             1989           1989        1989
16                                   opina          november 29 - 30        html            34.3%          13.7%        7.2%
17                                    1988                      1988        1988             1988           1988        1988
18  european election (seat extrapolation)            june 10 , 1987        html        39.1% 169       16.2% 25       14.4%
19                         local elections            june 10 , 1987        html            37.1%          20.3%       16.7%
20                                    1987                      1987        1987             1987           1987        1987
21                                  gallup  october 19 - december 23        html            42.0%              -       18.9%
22                        election results            june 22 , 1986        html        44.1% 184       11.1% 17       18.1%

Table as JSON:
{"polling firm":{"0":"election results","1":"exit polls","2":"sigma dos","3":"icp research","4":"opina","5":"iif","6":"demoscopia","7":"opina","8":"psoe","9":"el país","10":"cis","11":"metra seis","12":"european election (seat extrapolation)","13":"opina","14":"opina","15":"1989","16":"opina","17":"1988","18":"european election (seat extrapolation)","19":"local elections","20":"1987","21":"gallup","22":"election results"},"date":{"0":"october 29 , 1989","1":"exit polls","2":"october 23","3":"october 16 - 19","4":"october 16 - 18","5":"october 16 - 17","6":"october 9 - 15","7":"october 7 - 11","8":"october 5","9":"october 5","10":"october 5","11":"september 19 - 22","12":"june 15 , 1989","13":"june 4","14":"january 17 - 18","15":"1989","16":"november 29 - 30","17":"1988","18":"june 10 , 1987","19":"june 10 , 1987","20":"1987","21":"october 19 - december 23","22":"june 22 , 1986"},"link":{"0":"html","1":"exit polls","2":"html","3":"html","4":"html","5":"html","6":"html","7":"html","8":"html","9":"html","10":"html","11":"html","12":"html","13":"html","14":"html","15":"1989","16":"html","17":"1988","18":"html","19":"html","20":"1987","21":"html","22":"html"},"psoe":{"0":"39.6% 175","1":"exit polls","2":"- 168","3":"- 174 - 178","4":"41.5% 172 - 178","5":"- 173 - 183","6":"41.6% 176 - 182","7":"41.0% 172 - 178","8":"- 175 - 185","9":"- 176","10":"43.0% 178 - 180","11":"- 172 - 179","12":"39.6% 186","13":"36.1%","14":"37.9%","15":"1989","16":"34.3%","17":"1988","18":"39.1% 169","19":"37.1%","20":"1987","21":"42.0%","22":"44.1% 184"},"others":{"0":"12.6% 19","1":"exit polls","2":"- 23","3":"- 25 - 26","4":"15.0% 18 - 27","5":"- 18 - 23","6":"- 17 - 23","7":"12.4% 18 - 24","8":"-","9":"-","10":"-","11":"- 26 - 28","12":"21.5% 28","13":"17.3%","14":"13.0%","15":"1989","16":"13.7%","17":"1988","18":"16.2% 25","19":"20.3%","20":"1987","21":"-","22":"11.1% 17"},"lead":{"0":"13.8%","1":"exit polls","2":"-","3":"-","4":"16.5%","5":"-","6":"18.8%","7":"17.0%","8":"-","9":"-","10":"22.0%","11":"-","12":"18.2%","13":"13.7%","14":"14.8%","15":"1989","16":"7.2%","17":"1988","18":"14.4%","19":"16.7%","20":"1987","21":"18.9%","22":"18.1%"}}