Data is collected using {HEAD ~ both the SATPS and non SATPS methods} to obtain {TAIL ~ a master data} set 
Data is collected using { HEAD ~ both the SATPS and non SATPS methods } to obtain { TAIL ~ a master data } set
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH