Text pairs

For 3 words sentence there will be 6 text concepts.
3 words and 3 phrases.

3 TextPairs will be found:
word1 -> word2
word1 -> phrase2
word2 -> word3



For 10-words sentence there will be
10 words
9 two-word phrases
8 three-word phrases
7 four-word phrases
6 five-word phrases
(I don't consider phrases longer than 5 words)
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Total: 40 Text copcepts in the TextConcept collection

There will be maximum 5 text concepts with the same "StartingPosition" key.