Table for the 4 triples with object "1912-03-20" sorted by label

Subject	Predicate
mdb:kapitein-reder: Pronk, Jan (uit Hoogezand (NL))	mdb:datum
mdb:lichtmatroos-kok: Schneiders, Johannes Cornelis (uit Haarlem (NL))	mdb:datum
mdb:lichtmatroos: Looy, van, Jan (uit Haarlem (NL))	mdb:datum
mdb:Rival (1912-03-20)	mdb:datum