... the default mappings and non-cano- nicoJ mappings for the exceptions. For example, the tem- plate consists of two rows, one of thematic roles, and the other of syntactic positions. A canonical ... its design in the context of machine learning research. There has been little work on the acquisition of thematic relation and case roles, due to the absence of any consensus on their formal ... describe a computational model of con- cept acquisition for natural language making use of po- sitive-only data, modelled on a theory of lexical seman- tics. This theory, the Eztende~t Aspect...