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What is a top-down parser?(a) Begins by hypothesizing a sentence (the symbol S) and successively predicting lower level constituents until individual preterminal symbols are written(b) Begins by hypothesizing a sentence (the symbol S) and successively predicting upper level constituents until individual preterminal symbols are written(c) Begins by hypothesizing lower level constituents and successively predicting a sentence (the symbol S)(d) Begins by hypothesizing upper level constituents and successively predicting a sentence (the symbol S)I got this question by my school teacher while I was bunking the class.Asked question is from Machine Learning topic in section Introduction to Artificial Intelligence of Artificial Intelligence

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The CORRECT answer is (a) Begins by hypothesizing a sentence (the SYMBOL S) and successively predicting lower level constituents until individual preterminal symbols are WRITTEN

Easy EXPLANATION: A top-down PARSER begins by hypothesizing a sentence (the symbol S) and successively predicting lower level constituents until individual preterminal symbols are written.



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