However, they are compositionally less rigid than some other types of multiword expressions such as, e.g., idioms (as, e.g., [to] kick the bucket) or multiword lexical units (as, e.g., President of the United States or chief inspector).
the second variant, referred to as rvAE, starts from the same high-dimensional relation vector, but then uses a conditional autoencoder to obtain a lower-dimensional and potentially higher-quality 300d vector 6 .