SELECT COUNT("Kennedy votes") FROM table_26597 WHERE "Coakley votes" = '2139'
How many votes did kennedy win when coaklely won 2139 votes?
CREATE TABLE table_26597 (
    "County" text,
    "Coakley %" text,
    "Coakley votes" real,
    "Brown %" text,
    "Brown votes" real,
    "Kennedy %" text,
    "Kennedy votes" real
)