Before revision:  Recent approaches can broadly be classified into two categories: embedding-based approaches and path-based approaches. In contrast to embedding-based approaches, which operate in an uninterpretable latent semantic vector space of entities and relations,  path-based approaches operate in the symbolic space, making the inference process explainable.
After revision:  Recent approaches can broadly be classified into two categories: embedding-based approaches operate in an uninterpretable latent semantic vector space of entities and relations, path-based approaches operate in the symbolic space, making the inference process explainable.