user: Question: What is the weight of the player from club Panionios G.C. and was born on 1975-05-21?
Columns: ['Name', 'Pos.', 'Height', 'Weight', 'Date of Birth', 'Club']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Georgios Reppas', 'GK', 'm (ft 2in)', 'kg (lb)', '1974-12-11', 'N.C. Vouliagmeni']
SQL:

assistant: SELECT "Weight" FROM "Table" WHERE "Club" = 'Panionios G.C.' AND "Date of Birth" = '1975-05-21';