In the desert the wind moves the sand into dunes, piling it up and covering the surfaces with ripples.
(the wind; moves; the sand; into dunes; L:In the desert) Context(the wind moves,List([14, 28))):(the wind; moves the sand piling up; it)
the wind moves,List([14, 28))
the wind the wind
moves moves the sand piling up
the sand into dunes L:In the desert
it