A biochip, {HEAD ~ a platform} which composes {TAIL ~ the biochip}, and a stage which composes the platform 
A biochip , { HEAD ~ a platform } which composes { TAIL ~ the biochip } , and a stage which composes the platform
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH