Sentence:  So it <WSD>is</WSD> too with many other spirits which we all know : the spirit of Nazism or Communism , school spirit , the spirit of a street corner gang or a football team , the spirit of Rotary or the Ku Klux Klan . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)