Which of these data sources is an example of semi-structured data?1 pointSocial media feedsNetwork and web logsEmailsDocuments

The example of semi-structured data among the options provided is "Emails".

Here's why:

1. Social media feeds: These are typically unstructured data. They contain free-form text, images, videos, and other types of content that do not fit neatly into a database.

2. Network and web logs: These are typically structured data. They are usually stored in a structured format, such as a database, and have a clear, predefined data model.

3. Emails: These are semi-structured data. While they have some structured elements, such as the sender, recipient, and timestamp, they also contain unstructured elements, such as the body of the email.

4. Documents: These are typically unstructured data. They contain free-form text that does not fit neatly into a database.

Emails are an example of semi-structured data.

Here's why:

1. Semi-structured data is a type of data that is not organized in a pre-defined manner or with a pre-defined data model, but it contains tags or other markers to enforce hierarchy and relationships among data elements.

2. Emails are semi-structured because they have some fixed fields (like "To", "From", "Subject", "Date", etc.) that are the same across all emails, but they also contain a body, which can be free-form text and can contain any type of information in any format. This makes them not completely structured (like a database table) but not completely unstructured (like a social media post) - hence, they are semi-structured.

3. On the other hand, social media feeds and documents are examples of unstructured data because they do not have a specific format or organization. Network and web logs can be either structured or semi-structured, depending on the specific format and information they contain.