They suggest that the shift resulted in a change in the earth's spin axis caused by a movement of mass either on or within the earth.
(a change in the earth's spin axis; caused; by a movement of mass either on or within the earth) (They; suggest; that the shift resulted in a change in the earth's spin axis) Context(They suggest,List([0, 12))):(the shift; resulted; in a change in the earth's spin axis)
They suggest,List([0, 12))
a change in the earth's spin axis They the shift
caused suggest resulted
by a movement of mass either on or within the earth
that the shift resulted in a change in the earth's spin axis
in a change in the earth's spin axis