She saw the island sink steadily into the depths, first the beach, then the grassy lawn, and finally the white marble palace itself.
(She; saw; the island sink steadily into the depths, first the beach) Context(She saw,List([0, 7))):(the island; sink steadily; into the depths; T:first the beach)
She saw,List([0, 7))
She the island
saw sink steadily
the island sink steadily into the depths, first the beach
into the depths T:first the beach