Great question. Regarding the third sentence, "agorae" is just another word for marketplace, so we do consider it. We're just calling it "marketplace" instead of "agorae."
The fourth sentence could be diagrammed as an either/or statement. There are actually two conditional statements in the fourth sentence.
Greek city marketplace - >centrally located
Greek city marketplace - >goods traded for money or goods traded for commodities
However, the fourth sentence gives us no information that can be combined with the other information in the stimulus to push out an inference, so it's ultimately not useful for us.
Does this make sense? Let us know if you have any questions!
