The third level of analysis is Semantic analysis . Semantic associated with meaning of the language. Semantic analysis is concerned with creating meaning representation of linguistic input. The idea of Semantic interpretation is take some NL sentences and map them onto some representation of meaning. Grammatically valid sentences can be meaningless.
Example colorless green ideas sleep furiously ( Chomsky 1957) the sentence is well-formed i.e Syntactically correct but semantically anomalous Syntax is not only the component of meaning We feel that humans apply all sort of knowledge to arrive at the meaning of the sentence.( 1,2,3,4,5) The semantic analyzer disregards sentence such as “hot ice-cream”. Another Example is “Manhattan calls out to Dave” passes a syntactic analysis because it’s a grammatically correct sentence. However, it fails a semantic analysis. Because Manhattan is a place (and can’t literally call out to people), the sentence’s meaning doesn’t make sense.