public static class CoreAnnotations.BeginIndexAnnotation extends Object implements CoreAnnotation<Integer>
Tree.indexSpans(int). This annotation counts tokens. It standardly indexes from 1 (like IndexAnnotation). The reasons for this are: (i) Talking about the first word of a sentence is kind of natural, and (ii) We use index 0 to refer to an imaginary root in dependency output.
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Returns the type associated with this annotation.
Stanford NLP Group