For example, {HEAD ~ the client} with his communications system is traveling by train and can listen to {TAIL ~ music} 
listen to
For example , { HEAD ~ the client } with his communications system is traveling by train and can listen to { TAIL ~ music }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL