| http://www.w3.org/ns/prov#value | - I. Every left-recursive grammar can be converted to a right-recursive grammar and vice-versa II. All e-productions can be removed from any context-free grammar by suitable transformations III. The language generated by a context-free grammar all of whose productions are of the form X ?? w or X ?? wY (where, w is a string of terminals and Y is a non-terminal), is always regular IV. The derivation t
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