Why do you call them polka dots?
{"id": "ld1-1646149545906-1646149859524-1", "version": "", "unitCode": "SIL", "linkedId": "0", "type": "edanmdm", "content": {"descriptiveNonRepeating": {"record_ID": "siris_sil_145150", "online_media": {"mediaCount": 1, "media": [{"thumbnail": "https://library.si.edu/sites/default/files/styles/book_cover_small/public/books/covers/whydoyoucallthem00chen_cover.jpg", "usage": {"access": "CC0"}, "type": "Scanned books", "content": "https://doi.org/10.5479/sil.145150.39088002915817"}]}, "unit_code": "SIL", "title_sort": "WHY DO YOU CALL THEM POLKA DOTS", "record_link": "https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!145150~!0#focus", "title": {"label": "Title", "content": "Why do you call them polka dots?"}, "metadata_usage": {"access": "CC0"}, "data_source": "Smithsonian Libraries"}, "indexedStructured": {"date": ["1910s"], "object_type": ["Books", "Electronic information resources"], "name": ["Polk, James K", "Cheney Brothers"], "topic": ["Polka (Dance)", "Silk industry"], "language": ["English language"], "online_media_type": ["Scanned books"]}, "freetext": {"date": [{"label": "Date", "content": "1918"}], "identifier": [{"label": "Call number", "content": "TS1669 .W62"}, {"label": "Call number", "content": "TS1669.W62"}], "notes": [{"label": "Notes", "content": "On cover: Cheney silks."}, {"label": "Notes", "content": "Also available online."}, {"label": "Notes", "content": "Elecresource"}], "name": [{"label": "Author", "content": "Cheney Brothers"}, {"label": "Subject", "content": "Polk, James K (James Knox) 1795-1849"}], "topic": [{"label": "Topic", "content": "Silk industry"}, {"label": "Topic", "content": "Polka (Dance)"}], "physicalDescription": [{"label": "Physical description", "content": "[13] p. : ill. ; 19 cm"}], "dataSource": [{"label": "Data Source", "content": "Smithsonian Libraries"}], "objectType": [{"label": "Type", "content": "Electronic resources"}]}}, "url": "edanmdm:siris_sil_145150", "hash": "cd0ad76756af9e3b30df1b13c1cc11f588fe8921", "docSignature": "f8f16c80b11d94bd4196ecda66304294", "timestamp": 1582103449, "lastTimeUpdated": 1582103449, "title": "Why do you call them polka dots?"}