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