Page code:

    <div id="parent">
        <div id="kek">
            <div id="lol">
                <div id="arbidol">

                </div>
            </div>
        </div>
    </div>

Run in browser console:

document.getElementById("kek").querySelector("div > div > div")

Which element's ID will be found?

Answer:

lol

Explanation on MDN