027

blvh:slot:027

sampling_operation; slot=027; candidate_set=historical; subgroup=east_asia; target_period=1870-1899; query_pool=Japan; Japanese city; Japanese village; East Asia; Meiji Japan; mask_rule=record; do not use as truth criterion; book_cap=max 2 selected images per book; selection_method=SigLIP2 semantic retrieval + diversity review; required_provenance=fname, record_id, query_text, rank, similarity, model, image_type, date_raw; status=TO_SELECT; sampling_version=blvh-0.2. observation_status=machine_selection_plan; NEVER promote the semantic query to a factual subject label.