SELECT ABS((SELECT "death year" FROM table_204_734 WHERE "first name" = 'seitz') - (SELECT "death year" FROM table_204_734 WHERE "first name" = 'aizele'))
what is the difference between the year seitz died and the year aizele died ?
CREATE TABLE table_204_734 (
    id number,
    "first name" text,
    "surname" text,
    "death year" number,
    "beginning of\nservice" text,
    "end of\nservice" text,
    "notes" text
)