Hmm, how do I identify proper nouns? Proper nouns are specific names like "New York," "John," "Apple Inc." I can't just assume; maybe the user expects me to keep any capitalized words that are names. But how to differentiate between proper nouns and just capitalized words? Maybe in the input, any word starting with a capital letter that's not a regular noun (like starting a sentence) should be left as is. But that's tricky. The user might just want me to leave words that are proper nouns as they are, based on their capitalization. But how to know for sure? Maybe the user expects a simplistic approach, just leaving any word with a capital letter as is.
Given that, perhaps I should invent a sample text and demonstrate how to apply the transformation. For example, take "The cat jumps over the lazy dog." The proper noun is "The" at the start, but the user might consider that part of sentence structure and not a proper noun. However, "cat" is a common noun. Replace each with three options. kanchipuram iyer sex video 2
So, my plan is: