{HEAD ~ The image generation unit} then calculates {TAIL ~ the facial configuration} corresponding to the position in the string of phonemes, calculates the facial configuration, and causes the facial configuration to be displayed on a video device 
{ HEAD ~ The image generation unit } then calculates { TAIL ~ the facial configuration } corresponding to the position in the string of phonemes , calculates the facial configuration , and causes the facial configuration to be displayed on a video device
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH