The Sentence Diagram Generator visually represents the grammatical structure of the sentence: "That the vocabulary pertaining to domestic crops accompanies them as they diffuse into new regions is an established phenomenon globally."

1. Main Clause: "is an established phenomenon globally"
   • Subject: "That the vocabulary pertaining to domestic crops"
     • "the vocabulary"
       • Modifier: "pertaining to domestic crops"
         • "pertaining" (verb)
         • Object: "domestic crops"
   • Predicate: "accompanies them as they diffuse into new regions"
     • Verb: "accompanies"
     • Direct Object: "them"
     • Adverbial Clause: "as they diffuse into new regions"
       • Subject: "they"
       • Verb: "diffuse"
       • Prepositional Phrase: "into new regions"

This structure highlights the relationships between the components of the sentence, illustrating how the clauses and phrases interact within the overall grammatical framework.