Complex sentence: Demeny voting is named after demographer Paul Demeny, who argued in 1986 that children "should not be left disenfranchised for some 18 years: let custodial parents exercise the children's voting rights until they come of age".
Split into simpler sentences: Demeny voting is named after demographer Paul Demeny, who came up with the idea in 1986. Demeny argued that children "should not be left disenfranchised for some 18 years: let custodial parents exercise the children's voting rights until they come of age".