SELECT "Team #1" FROM table_64690 WHERE "2nd leg" = '64-97'
What is team number 1 when then 2nd leg is 64-97?
CREATE TABLE table_64690 (
    "Team #1" text,
    "Agg." text,
    "Team #2" text,
    "1st leg" text,
    "2nd leg" text
)