That Wikipedia article is about the linguistic kind. I assume the stuff in schools is <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sentence_diagram" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sentence_diagram</a> ? These are... weird.