For example, the processing unit 104 can search {TAIL ~ the feature index} to determine whether the item is contained in {HEAD ~ the sensor data} 
For example , the processing unit 104 can search { TAIL ~ the feature index } to determine whether the item is contained in { HEAD ~ the sensor data }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD