Adds possibility to extract a taxonomy from taxonomic path included in sequence files

pkg/obiseq/taxonomy_predicate.go

@@ -63,7 +63,12 @@ func IsSubCladeOfSlot(taxonomy *obitax.Taxonomy, key string) SequencePredicate {
 		val, ok := sequence.GetStringAttribute(key)
 
 		if ok {
-			parent := taxonomy.Taxon(val)
+			parent, err := taxonomy.Taxon(val)
+
+			if err != nil {
+				log.Warnf("%s: %s is unkown from the taxonomy (%v)", sequence.Id(), val, err)
+			}
+
 			taxon := sequence.Taxon(taxonomy)
 			return parent != nil && taxon != nil && taxon.IsSubCladeOf(parent)
 		}