The annotations in LexicalSemanticsLayer
are represented by synonymy,
antonymy, hyponymy, hyperonymy. The layers specify the resource from which
the annotations were extracted, and enumerate the orthform elements. Each
orthform element has an orthform string (can be a word, a phrase, or a list
of both) and references lemmas that are in synonymy/antonymy/hyponymy/hyperonymy
relations with this orthform.