Table for the 4 triples with object "1893-08-21" sorted by label

Subject	Predicate
mdb:kapitein: Visser, Berend (uit Farmsum (NL))	mdb:datum
mdb:matroos: Ylstra, Hendrik (uit Harlingen (NL))	mdb:datum
mdb:matroos: Ylstra, Klaas (uit Harlingen (NL))	mdb:datum
mdb:Montrose (1893-08-21)	mdb:datum