CREATE TABLE table_24143253_4 (cause_of_death VARCHAR, length_of_marriage VARCHAR)

What was the cause of death in the marriage that lasted 28 years?
SELECT cause_of_death FROM table_24143253_4 WHERE length_of_marriage = "28 years"
SELECT "cause_of_death" FROM "table_24143253_4" WHERE "28 years" = "length_of_marriage"