The sentence part which you locate first?

As a language model, I don't have the ability to physically locate anything. I can only process and understand text.

If you're asking about how I analyze a sentence, I would say that I first focus on the subject and verb, as they are the core elements of a sentence. This allows me to understand the basic action and who or what is performing it.

From there, I then look at the object, adjectives, adverbs, and other modifiers to get a full understanding of the sentence's meaning.