When water quality declines, some of these animals disappear, indicating that something is wrong.
(some of these animals; disappear; ) (When water quality declines; indicating; that something is wrong) Context(When water quality declines indicating,List([0, 72))):(something; is; wrong)
When water quality declines indicating,List([0, 72))
some of these animals When water quality declines something
disappear indicating is
that something is wrong
wrong