The grammars of natural languages may be learned by using genetic algorithms that reproduce and mutate grammatical rules and part-of-speech tags, improving the quality of later generations of grammatical components. Syntactic rules are randomly generated and then evolve; those rules resulting in improved parsing and occasionally improved retrieval and filtering performance are allowed to furthe...

' Don Cameron Allen, "On Venus and Adonis',' Elizabethan and Jacobean Studies Presented to Frank Percy Wilson, ed. Herbert Davis and Helen Gardner (Oxford 1959), p. 100; on Adonis' unwillingness, see also T. W. Baldwin, On the Literary Genetics of Shakespeare's Poems and Sonnets (Urbana 1950); Geoffrey Bullough, Narrative and Dramatic Sources of Shakespeare, I (New York 1957), p. 7; William Kea...