SELECT "Lead" FROM table_71379 WHERE "Polling Firm" = 'election results' AND "PSOE" = '39.6% 175'
What is lead for the Election Results polling firm and has a PSOE of 39.6% 175?
CREATE TABLE table_71379 (
    "Polling Firm" text,
    "Date" text,
    "Link" text,
    "PSOE" text,
    "Others" text,
    "Lead" text
)