How is unbreakable split and glass connected?

Related questions

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2. Should I watch unbreakable before glass?
3. Is glass related to unbreakable?
4. Does anything happen at the end of Avengers endgame?
5. Is glass a sequel to split?
6. Is unbreakable a true story?
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Tags

1. #twisty
2. #connects
3. #tricks
4. #superhero
5. #something
6. #getting
7. #twisted
8. #again
9. #iconic
10. #glass
11. #unbreakable
12. #night
13. #split
14. #together
15. #genre
16. #shyamalan
17. #bring
18. #director