an Entity references as follows:
Robert D. Van Valin Jr. (born February 1, 1952) is an American linguist and the principal researcher behind the development of Role and Reference Grammar, a functional theory of grammar encompassing syntax, semantics, and discourse pragmatics. His 1997 book (with Randy J. LaPolla) Syntax: structure, meaning and function is an attempt to provide a model for syntactic analysis which is just as relevant for languages like Dyirbal and Lakhota as it is for more commonly studied Indo-European languages.