how do you classify "inside a circus room, the gigantic elephant screamed loudly inside the small hole." ??

I have no idea about Shurley English. I'll tell you what each word is and what type of sentence this is. You can use the information as you wish.

Inside - preposition
a - article
circus - noun
room - noun
the - article
gigantic - adjective
elephant - noun (subject)
screamed - verb (main verb)
loudly - adverb
inside - preposition
the - article
small - adjective
hole - noun

Simple sentence with 2 prepositional phrases.