SELECT "Assembled" FROM table_61935 WHERE "2nd member" = 'unknown' AND "Elected" = '1482/83'
What is the assembled date of the parliament with an unknown 2nd member who was elected in 1482/83?
CREATE TABLE table_61935 (
    "Summoned" text,
    "Elected" text,
    "Assembled" text,
    "Dissolved" text,
    "1st member" text,
    "2nd member" text
)