In response to the request, the customization application allows a user to modify a set of features associated with {HEAD ~ the user role} to form {TAIL ~ a set} of customized features 
to form
In response to the request , the customization application allows a user to modify a set of features associated with { HEAD ~ the user role } to form { TAIL ~ a set } of customized features
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH