In order to extract a word concept in a sentence, there are three steps:
1. Use BiLSTM or BiGRU to get word semantic information. Because the same word may have different meaning in different sentence.
2. Collect some candidate concepts belong to this word. We should generate concept embedding.
3. Use attention mechanism to find the concept attention weight to composite final concept embedding below to this word in sententce.
Here is the full tutorial!