Saga Lemmatizer stage uses a dictionary file to identify words and reduce word forms to their basic form. For example it will identify that "running" is a verb form (gerund) and will reduce it to its base infinitive form "run".
The Lemmatizer will also expand the word to synonyms in case there are synonyms available in the dictionary file for a specific word.
An important note here is that Sage Lemmatizer Stage code is agnostic to what reductions or expansions it uses. These series of reductions and expansions are called Relationship types and are defined in the dictionary file and in the Lemmatizer configuration.
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