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When a user says "Book an appointment for tomorrow," which Lex feature extracts "tomorrow" as an input for processing?
Explanation:
In Amazon Lex, slots are used to extract specific pieces of information from user utterances. In this case, "tomorrow" is a date-related value that needs to be captured as input for processing the appointment booking.
The correct answer is B) Slot because slots are specifically designed to extract and process variable inputs like dates, names, and other parameters from user messages.