Table for the 3 triples with object "pero" sorted by label

Subject	Predicate
lp_eu:1999-07-21-Speech-3-026	lpv:unclassifiedMetadata
lp_eu:1999-10-06-Speech-3-250	lpv:unclassifiedMetadata
lp_eu:2005-02-22-Speech-2-193	lpv:unclassifiedMetadata