Complex sentence: From 1951 to 1953, Belcher was the last representative of Oklahoma's now-defunct 8th congressional district, then represented 1st congressional district until 1973.
Split into simpler sentences: From 1951 to 1953, Belcher was the last representative of the now defunct 8th congressional district. Starting in 1953, Belcher would remain the representitive of the 1st congressional district until 1973.