Missing detection of present CEUR proceedings

[fnielsen]

Describe the bug
Missing detection of present CEUR proceedings: A CEUR-WS proceeding was not detected as already available in Wikidata.

To Reproduce
Steps to reproduce the behavior (Does not reproduce now):

$ python -m scholia.scrape.ceurws proceedings-url-to-quickstatements https://ceur-ws.org/Vol-175/
CREATE
LAST	P31	Q1143604
LAST	P1813	en:"Semantic Desktop Workshop"
LAST	Aen	"Semantic Desktop Workshop"
LAST	Den	"proceedings from Semantic Desktop Workshop"
LAST	P478	"175"
LAST	P407	Q1860
LAST	P856	"https://ceur-ws.org/Vol-175/"
LAST	P1433	Q27230297

Expected behavior

# https://ceur-ws.org/Vol-175/ is https://www.wikidata.org/entity/Q102045565

In the first query it did not detect the proceeding was already present in Wikidata.