SELECT "silver" FROM table_203_104 WHERE "athlete" = 'evgeni plushenko'
how many silver medals did evgeni plushenko get ?
CREATE TABLE table_203_104 (
    id number,
    "athlete" text,
    "nation" text,
    "olympics" text,
    "gold" number,
    "silver" number,
    "bronze" number,
    "total" number
)