title: Spacy SpanGroup
body: <p>I am trying to use spaCy's SpanGroup class, but the following commands both give a ModuleNotFoundError:</p>
  <p><code>from spacy.tokens.span_group import SpanGroup</code> and
  <code>from spacy.tokens import SpanGroup</code></p>
  <p>I tried looking at the spaCy documentation, but their command wasn't working. Does someone know the correct command to import SpanGroup?</p>