 “ Virtual World Framework Homepage About section ” constructive simulations, in which simulated people operate simulated systems, are stimulated using human inputs.
<fluency>  “ Virtual World Framework Homepage About section ” constructive simulations, in which simulated people operate simulated systems, are stimulated using human inputs.
 " Virtual World Framework Homepage About section ” constructive simulations, in which simulated people operate simulated systems, are stimulated using human inputs.