Table for the 4 triples with object "UNKNOWN, UNKNOWN" sorted by label

Subject	Predicate
aers:Involvement of EFFER ANTACID PAIN TAB 421 in #8168725	aersVocab:drug dose
aers:Involvement of EFFER ANTACID PAIN TAB 421 in #8215262	aersVocab:drug dose
aers:Involvement of HEPARIN in #8200479	aersVocab:drug dose
aers:Involvement of VANCOMYCIN in #8215496	aersVocab:drug dose