The extrinsic label B, which begins a noun phrase, is automatically split into 4 subcategories: wh-determiners (WDT, such as "that") together with wh-pronouns (WP, such as "who"), the determiners (DT, such as "any, an, a"), the personal pronouns (PRP, such as "they, we, he"), and the singular proper nouns (NNP, such as "Nasdaq, Florida") together with the plural nouns (NNS, such as "cities").
latent-dynamics is an intermediate representation between input features and labels, and explicitly modeling this can simplify the problem.