: Most of the mills in the region have constructed secondary treatment plants to remove the fiber and materials which are toxic to fish and impact on the environment.
(materials; are; toxic to fish and impact on the environment) (Most of the mills in the region; have constructed; secondary treatment plants; to remove the fiber and materials) Context(Most of the mills in the region have constructed,List([2, 50))):(Most of the mills in the region; have constructed secondary treatment plants to remove; the fiber and materials)
Most of the mills in the region have constructed,List([2, 50))
materials Most of the mills in the region Most of the mills in the region
are have constructed have constructed secondary treatment plants to remove
toxic to fish and impact on the environment
secondary treatment plants to remove the fiber and materials
the fiber and materials