AIMA.Core.Logic.FOL.Parsing.FOLParser.parseSentence C# (CSharp) Method

        private Sentence parseSentence()
        {
            Token t = lookAhead(1);
            if (lParen(t))
            {
                return parseParanthizedSentence();
            }
            else if ((lookAhead(1).getType() == (int)LogicTokenTypes.QUANTIFIER))
            {

                return parseQuantifiedSentence();
            }
            else if (notToken(t))
            {
                return parseNotSentence();
            }
            else if (predicate(t))
            {
                return parsePredicate();
            }
            else if (term(t))
            {
                return parseTermEquality();
            }

            throw new ApplicationException("parse failed with Token " + t.getText());
        }