question: public static Sentence parse ( final String text , final ConversationContext ctx ) { String txt ; if ( text == null ) { txt = "" ; } else { if ( ( ctx != null ) && ctx . isForMatching ( ) ) { final ExpressionMatcher matcher = new ExpressionMatcher ( ) ; txt = matcher . readMatchingFlags ( text ) ; if ( matcher . isAnyFlagSet ( ) ) { return matcher . parseSentence ( txt , ctx ) ; } } else { txt = text ; } } txt = txt . trim ( ) ; final SentenceImplementation sentence = new SentenceImplementation ( ctx , txt ) ; try { final ConversationParser parser = new ConversationParser ( sentence ) ; sentence . parse ( parser ) ; sentence . classifyWords ( parser ) ; if ( ( ctx != null ) && ctx . getMergeExpressions ( ) ) { sentence . evaluateSentenceType ( ) ; sentence . mergeWords ( ) ; if ( ! ctx . isForMatching ( ) ) { sentence . standardizeSentenceType ( ) ; sentence . performaAliasing ( ) ; } } sentence . setError ( parser . getErrorString ( ) ) ; } catch ( final Exception e ) { LOGGER . error ( "ConversationParser.parse(): caught Exception while parsing '" + text + '\'' ) ; sentence . setError ( e . getMessage ( ) ) ; e . printStackTrace ( ) ; } return sentence ; }
target:  Parse the given text sentence.