What is the fine-grained topic of the following text: This was opened up for debate at the end which ended up being a very lively discussion between artists, architects, students, and other professionals such as business managers at oil companies, it was interesting to hear all the strong opinions about whether architecture is a form of fine art or not and how each of them had validity. Only return the topic.
The fine-grained topic of the text is "debate on whether architecture is a form of fine art."