be used to generate coherent and grammatically correct sentences in American English. Incorporating semantic information into the context-free grammar: Expand the context- free grammar to incorporate semantic information, such as word meaning and context, to generate more meaningful sentences in American English. Here is my java parser: import java.util.*;
I need help extending the given java parser to do the following
Developing a language model based on the context-free grammar: Use the context-free grammar to develop a language model that can be used to generate coherent and grammatically correct sentences in American English.
Incorporating semantic information into the context-free grammar: Expand the context- free grammar to incorporate semantic information, such as word meaning and context, to generate more meaningful sentences in American English.
Here is my java parser:
import java.util.*;
import java.util.stream.Collectors;
public class CFG {
private static Map<String, List<String>> rules;
public static void main(String[] args) {
rules = new HashMap<>();
initializeGrammarRules();
String sentence = generateSentence("S");
System.out.println(sentence);
}
private static void initializeGrammarRules() {
rules.put("S", Arrays.asList("NP VP"));
rules.put("NP", Arrays.asList("Det N", "Det AP N"));
rules.put("AP", Arrays.asList("Adj", "Adj AP"));
rules.put("VP", Arrays.asList("V NP", "V NP PP"));
rules.put("PP", Arrays.asList("P NP"));
rules.put("Det", Arrays.asList("the", "a", "an"));
rules.put("N", Arrays.asList("cat", "dog", "book", "tree"));
rules.put("Adj", Arrays.asList("big", "small", "brown", "green"));
rules.put("V", Arrays.asList("chased", "ate", "read", "climbed"));
rules.put("P", Arrays.asList("in", "on", "under", "above"));
}
private static String generateSentence(String symbol) {
List<String> alternatives = rules.get(symbol);
if (alternatives == null) {
return symbol;
}
String expansion = alternatives.get(new Random().nextInt(alternatives.size()));
String[] symbols = expansion.split("\\s+");
return Arrays.stream(symbols)
.map(CFG::generateSentence)
.collect(Collectors.joining(" "));
}
}
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