{"slug":"helena-grzeskiewicz-lech-grzeskiewicz","artist_id":"913e5f85-3857-4f2d-9af5-0dde229420cc","canonical_slug":"helena-grzeskiewicz-lech-grzeskiewicz","name":"Helena Grześkiewicz, Lech Grześkiewicz","built_at":"2026-11-01","categories":[{"bucket":"Other","lots_n":12,"sold_n":8,"median_price_usd_minor":75954,"record_price_usd_minor":120528,"record_basis":"premium","priced_lots_hammer_only":3,"priced_lots_unverified":0,"sell_through_pct":66.7,"last_sale_date":"2026-02-26","first_sale_year":2020}],"sizes":[],"notable":[],"last_sold":{"year":"2026","total_price_usd":90791,"priced_basis":"premium"},"upcoming_count":0,"content_modified":"2026-11-01","value_block_hash":"867ef1cf6413ee779f50babda5fcd51ac0907439"}