This phrase identifies a particular entity doubtless positioned in a specific metropolis and state. The elements recommend a enterprise, group, or presumably people related to the locality of Quincy, Illinois. Evaluation of every factor factors towards a correct noun building, with “Duker and Haugh” functioning as a compound noun designating the entity’s title, and “Quincy, Illinois” performing as a locative noun phrase specifying its geographic placement.
The relevance of this identifier stems from its position in pinpointing a topic inside a broader geographic space. Realizing the placement helps to contextualize the topic, enabling focused analysis, whether or not it includes exploring native enterprise exercise, historic data, or neighborhood demographics. The conjunction of the title with the placement ensures the correct identification of a single supply.