In previous work (Gkatzia et al., 2015) we found that the following syntactic categories predict successful REs: NP (Noun phrases), NNP (Proper noun, singular), NN (Noun, singular or mass), JJ (Adjective) and VBN (Verb, past participle).
the corpus is annotated with the following measures of success: Reference to the type of object that is aimed to be described.