#course.series__line  a connected series of events or actions or developments; "the government took a firm course"; "historians can only point out those lines for which evidence is available"
  supertype:  #series  similar things placed in order or happening one after another; "they were investigating a series of bank robberies"
  subtype:  #stream.course__flow__current  dominant course (suggestive of running water) of successive events or ideas: "two streams of development run through American history"; "stream of consciousness"; "the flow of thought"; "the current of history"

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