Table for the 3 triples with object "1911-10-21" on predicate mdb:datum sorted by label

Subject	Predicate
mdb:Betsy Anna (1911-10-21)	mdb:datum
mdb:kapitein: Laan, v.d., P. (uit Amsterdam (NL))	mdb:datum
mdb:stoker: Bos, T. (uit Delfzijl (NL))	mdb:datum