{TAIL ~ The intermediate layer} should have {HEAD ~ a flexural modulus} of 50,000 psi or greater 
{ TAIL ~ The intermediate layer } should have { HEAD ~ a flexural modulus } of 50,000 psi or greater
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH