The grammar is fine. She should be capitalized. The meaning is a mystery.
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Absolutely. The Learner's Dictionary is not even very comprehensive, as monolingual dictionaries go. My Merriam-Webster's Collegiate does not even indicate countability; the user is expected to figure it out by usage. No single dictionary or lexicon can contain all the 'pertinent' information about a language's word horde. The student must attempt to find out many thing