Complex sentence: The Chalmers family sold the lease of Utopia to the Aboriginal Land Fund in 1976 as a going concern, but the cattle enterprise had largely lapsed by the time the two land claims had been settled in 1978 and 1980.
Split into simpler sentences: The Chalmers family sold the lease of Utopia to the Aboriginal Land Fund in 1976 as a going concern. The cattle enterprise had largely lapsed by the time the two land claims were settled in 1978 and 1980.