How much grammar is needed in lexicon?

Although one can understand and accept the reasons for the distinction between lexicon and grammar, the development of the field in the last quarter of the 20th century brought to our attention domains of their overlap and unification. The starting point for the present analysis is Parallel Architecture, a theoretical framework which takes linguistic structure to be determined by three independent generative systems - phonology, syntax, and semantics, as well as the links between them. Choosing lexemes from the class of nouns and verbs, I want to show that even lexemes rich in semantic structures carry a significant amount of grammatical information within their lexical form.