Please rewrite this text to be coherent
Over its sixty-year history, Lisp has spawned many variations on the core theme of an S-expression language. Each given dialect may have several implementations -- for instance, there are more than a dozen implementations of Lisp.
Over its sixty-year history, Lisp has spawned many variations on the core theme of an S-expression language. Moreover, each given dialect may have several implementations -- for instance, there are more than a dozen implementations of Common Lisp.