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