As shown in the figure below, there is a red X sign in front of the newly added component, "CRF based named entity recognizer". This sign indicates that the named entity recognizer component is dependant on other NLP components that are missing from the current pipeline. In our example, the clinical notes first need to be processed by the sentence detector, tokenizer, section identifier, and POS tagger components before processing by the named entity recognizer. To fix this issue, simply click on the Auto fix button at the top of the panel. This automatically adds the required components to the pipeline. The sequence of the individual components from top to bottom reflect the order in which they will run to process your input data. After the required components are added (figure below), the red X sign changes to the green circle sign indicating the accuracy of the order of the components. Once you see the green sign for each of the displayed NLP components, click on the Save button at the top of the screen to save your changes.