CREATE TABLE table_name_20 (years VARCHAR, state VARCHAR, lifespan VARCHAR)

What years did the Representative from Iowa with a lifespan of 1880 1942 serve?
SELECT years FROM table_name_20 WHERE state = "iowa" AND lifespan = "1880–1942"
SELECT "years" FROM "table_name_20" WHERE "1880–1942" = "lifespan" AND "iowa" = "state"