Knowledge representation is one of the areas covered by artificial intelligence. One of the methods for graphical representation of text expressed knowledge is the method NOK (Nodes Of Knowledge). NOK method enables transformation of text expressed knowledge into a graphical network of words and group of words. In this paper application of NOK method is presented. This application is based on sentences from an Aesop's Fable in Croatian ("Golden eggs in the chicken") and English ("The Goose with the golden eggs") version. In this way the applicability of this method on two natural human languages is presented, and similarities and differences that are partially conditioned by freedom of translators, and not only by differences in the syntax of the two languages, are observed.

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The paper describes the improvement of the system for automatic question answering based on the knowledge expressed in natural language sentences. The system is implemented using a relational database. This system will be the basis for the development of a web application for obtaining answers to the posed questions. In order for natural language sentences to be entered into a relational database, they must be prepared and formally recorded. The development of a question-answering system is based on the application of the conceptual framework Node of Knowledge (NOK), whose formalized record is suitable for input to a relational database from which answers to questions can be obtained. This paper presents an application for automated conversion of English sentences into a formalized record. The application was tested on one hundred simple English sentences, and the results of the automated conversion were compared with those obtained by processing the same sentences manually. Ključne riječi Node of Knowledge (NOK), Formalized Node of Knowledge (FNOK), Knowledge Representation, Question-Answering (QA) system

The conceptual framework NOK (Node of Knowledge) consists of the NOK method, and DNOK and FNOK formalisms. Formalism DNOK enables a graphical representation and organization of knowledge in the form of a diagram as network nodes, and FNOK formalism represents knowledge in a textual form, which is suitable for entry into a relational database. This paper describes the representation of a text in DNOK form and formalized FNOK form, on the example of Aesop's fable "The Goose with the Golden Egg". The sentences from the fable consist of at least two actions, that is, they contain two verbs, and the paper shows that DNOK and FNOK formalisms can also be applied to such complex sentences.