Astronomers know that the number of visible stars can be different from the city to the country, and from season to season.
(Astronomers; know; that the number of visible stars can be different from the city to the country, and from season to season) Context(Astronomers know,List([0, 16))):(the number of visible stars; can be; different from the city to the country, and from season to season)
Astronomers know,List([0, 16))
Astronomers the number of visible stars
know can be
that the number of visible stars can be different from the city to the country, and from season to season
different from the city to the country, and from season to season