As the complex structure of the feathers that allows birds to float becomes damaged, the risk of drowning increases for birds.
(the complex structure of the feathers; becomes; damaged, the risk of drowning increases for birds) (the feathers; allows; birds to float) Context(the feathers allows,List([28, 52))):(birds; to float; )
the feathers allows,List([28, 52))
the complex structure of the feathers the feathers birds
becomes allows to float
damaged, the risk of drowning increases for birds
birds to float