Table: portuguese_election_1987
Columns: date_released
institute
social_democratic
socialist
green_communist
democratic_renewal
democratic_and_social_centre
lead

Question: What Social Democratic has a Democratic and Social Centre of 10.0% 22 seats?
SQL: SELECT "social_democratic" FROM portuguese_election_1987 WHERE "democratic_and_social_centre" = '10.0% 22 seats'

Question: What Social Democratic has the Democratic and Social Centre of 4.4% 4 seats?
SQL: SELECT "social_democratic" FROM portuguese_election_1987 WHERE "democratic_and_social_centre" = '4.4% 4 seats'