Which of the following is an example of unstructured data?

An example of unstructured data is a pathology report because it is typically composed of free text written in natural language that describes the findings of a medical examination. This type of data does not adhere to a predetermined data model or structure, making it complex and challenging to analyze using traditional data processing methods. Unstructured data is often rich in information but lacks the organization found in structured data, such as databases or spreadsheets, where data points are easily categorized and quantified.

In contrast to a pathology report, database entries and spreadsheets are structured data formats where information is organized in a predefined manner, allowing for easier analysis and manipulation. Text files can contain both structured and unstructured data; however, a typical text file does not specifically refer to the medical context that the pathology report does. Thus, the pathology report is a clear and pertinent example of unstructured data.