The last use of the firing squad between 1608 and the moratorium on judicial executions between 1967 and 1977 was when Utah shot James W. Rodgers on March 30, 1960. The last use of the gallows between 1608 and the moratorium was when Kansas hanged George York on June 22, 1965. The last use of the electric chair between the first electrocution on August 6, 1890 and the moratorium was when Oklahoma electrocuted James French on August 10, 1966. The last use of the gas chamber between the first gassing on February 8, 1924 and the moratorium was when Colorado gassed Luis Monge on June 2, 1967.

Answer this question, if possible (if impossible, reply "unanswerable"): Who was executed on March 30, 1990?
unanswerable