The processing unit receives a query for an item and uses the features index to determine {TAIL ~ search results} including the item, such as a location and a time of {HEAD ~ the item} 
The processing unit receives a query for an item and uses the features index to determine { TAIL ~ search results } including the item , such as a location and a time of { HEAD ~ the item }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD