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