‘aria-labelledby‘ overwrite ‘aria-label‘ overwirte native element label.
TOP-LEFT: aria-label overwrite native element label, so it is Gumnut.
TOP-RIGHT: it has role button, so the label is Wombat.
BOTTOM-LEFT: No labe, because label need id to bind to the input field, so need to add id="roo"
BOTTOM-RIGHT: aria-labelledby overwrite aria-label, so it is "Wallaby"
