{HEAD ~ A system} provides the user with {TAIL ~ a simulated environment} that presents a business opportunity to understand and solve optimally 
{ HEAD ~ A system } provides the user with { TAIL ~ a simulated environment } that presents a business opportunity to understand and solve optimally
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH