Table: port_leg_election_1999
Columns: date_released
polling_institute
socialist
social_democratic
green_communist
people_s_party
left_bloc
lead

Question: What is the people's party with an 8.0% green-communist?
SQL: SELECT "people_s_party" FROM port_leg_election_1999 WHERE "green_communist" = '8.0%'

Question: What is the social democrat released on October 10, 1999?
SQL: SELECT "social_democratic" FROM port_leg_election_1999 WHERE "date_released" = 'october 10, 1999'

Question: What is the green-communist with a 15.5% lead?
SQL: SELECT "green_communist" FROM port_leg_election_1999 WHERE "lead" = '15.5%'

Question: What is the left bloc with a 49.0% socialist?
SQL: SELECT "left_bloc" FROM port_leg_election_1999 WHERE "socialist" = '49.0%'

Question: Which polling institute has a 30.7% for social democratic?
SQL: SELECT "polling_institute" FROM port_leg_election_1999 WHERE "social_democratic" = '30.7%'

Question: What is the people's party with a 30.0% social democratic?
SQL: SELECT "people_s_party" FROM port_leg_election_1999 WHERE "social_democratic" = '30.0%'