Question: Name the people's party for social democratic of 30.1%
SQL: SELECT "People's Party" FROM "2-15125201-1" WHERE "Social Democratic" = '30.1%';

Question: Name the lead with left bloc of 8.4%
SQL: SELECT "Lead" FROM "2-15125201-1" WHERE "Left Bloc" = '8.4%';

Question: Name the lead for institute of Election Results and social democratic of 31.7% 8 seats
SQL: SELECT "Lead" FROM "2-15125201-1" WHERE "Institute" = 'Election Results' AND "Social Democratic" = '31.7% 8 seats';