Table for the 3 triples with object "1911-21" sorted by label

Subject	Predicate
mdb:kapitein: Beukema, R. (uit Delfzijl (NL))	mdb:bronid
mdb:Onderneming (1911-02-15)	mdb:bronid
mdb:stuurman: Komdeur, P. (uit Delfzijl (NL))	mdb:bronid