CREATE INDEX edit_instrument_idx ON edit_label (label);
CREATE UNIQUE INDEX l_area_instrument_idx_uniq ON l_area_label (entity0, entity1, link, link_order);
CREATE UNIQUE INDEX l_artist_instrument_idx_uniq ON l_artist_label (entity0, entity1, link, link_order);
CREATE INDEX l_area_instrument_idx_entity1 ON l_area_label (entity1);
CREATE INDEX l_artist_instrument_idx_entity1 ON l_artist_label (entity1);