Which two types of documents can the Intelligent Keyword Classifier distinguish?

The Intelligent Keyword Classifier is designed to categorize documents based on their specific attributes and content. In this context, invoices and passports represent two distinct classes of documents with identifiable characteristics that can be differentiated by the classifier.

Invoices typically contain structured data related to transactions, such as billing addresses, line items, and amounts due. They have a consistent format, which allows keywords and patterns to be recognized effectively. On the other hand, passports are official identification documents that also have specific features like personal identification details, photographs, and various security elements. The classifier can distinguish these due to the unique layout and content associated with each document type.

This capability of identifying and categorizing documents is crucial for automating processes in various industries, where understanding the nature of the document can lead to efficient data extraction and processing. The other options do not represent pairs of document types that lend themselves easily to classification based on keywords and characteristics in the same manner.