3. Recent advances in NLP # 옛날의 문제: definition of a suitable and effective representation of tokens, sentences, and documents # one-hot encoding 문제점: huge vector, drop of relations 3.1. Word and sentence vectors # Word2vec * word vectors or word embeddings - 비슷한 뜻의 단어 -> 비슷한 representation * CBOW: reconstruct a target word given its context as input * Skip-gram: predict context words given the t..