The second set of {TAIL ~ data} is {HEAD ~ a measured data} but is not used for training the neural network 
The second set of { TAIL ~ data } is { HEAD ~ a measured data } but is not used for training the neural network
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH