Why should add First before TextStructure when use CommunityGraphPlot?

Questions
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1

CommunityGraphPlot[ First[TextStructure[First[TextSentences[WikipediaData[“language”]]], “ConstituentGraphs”]]]

Hello,
I see this code on my book. I am confused why added the First before the

TextStructure[First[TextSentences[WikipediaData[“language”]]],
“ConstituentGraphs”]]

I know no First will cause error, but I don’t know why should add it?
Thanks.

2

What is TextStructure returning?

3

The structure of the sentence according to the words in it? What’s the answer and hot to get the answer from MMA?

4

TextStructure returns a list. The text can be multiple sentences, in which case the list contains an element for each sentence. CommunityGraphPlot requires a Graph as input, not a List of Graph.

5

Thanks for your kind reply. I know now.