Complex sentence: This notion contrasts starkly with the Chomskian proposition of a "Universal Grammar" as the prime mover for language; grammar still plays an integral role in lexis but it is the result of accumulated lexis, not its generator.
Split into simpler sentences: This notion contrasts starkly with the Chomskian proposition of a "Universal Grammar" as the prime mover for language. Grammar still plays an integral role in lexis, but it is the result of accumulated lexis, not its generator.