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