Early studies assumed that the environments of two fraternal twins were as similar to each other as were the environments of two identical twins.
(Early studies; assumed; that the environments of two fraternal twins were as similar to each other as were the environments of two identical twins) Context(Early studies assumed,List([0, 21))):(the environments of two fraternal twins; were; as similar to each other)
Early studies assumed,List([0, 21))
Early studies the environments of two fraternal twins
assumed were
that the environments of two fraternal twins were as similar to each other as were the environments of two identical twins
as similar to each other