The semantic object data model defined by the album includes one or more semantic objects, each of which includes {HEAD ~ one or more attributes} that define {TAIL ~ a characteristic} of the semantic objects 
define
The semantic object data model defined by the album includes one or more semantic objects , each of which includes { HEAD ~ one or more attributes } that define { TAIL ~ a characteristic } of the semantic objects
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH