query: SELECT ?item  ?woll_catalog WHERE {
    ?item wdt:P195 wd:Q844926 .
    ?item wdt:P31  wd:Q3305213 .
    ?item p:P528 [ pq:P972 wd:Q18891549; ps:P528 ?woll_catalog] .
    OPTIONAL { ?item wdt:P571 ?inception }
    } ORDER BY ?inception