Getting labels/names and invert wikidata query

Question

I'am trying to get the names of the victims, which got a "stolperstein" (stumblestone) in my hometown. But I can't get the names with SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }

I think, the query should be

SELECT ?Stolperstein ?StolpersteinLabel ?bild ?Person ?tod WHERE {
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  ?Stolperstein wdt:P31 wd:Q26703203;
    wdt:P131 wd:Q2107;
                SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
                wdt:P547 ?Person.

But it doesn't work. What am I doing wrong?

My second question is, how can I display the data with missing information. (invert the query / like NOT IN)

SELECT ?Stolperstein ?StolpersteinLabel ?bild ?Person ?tod WHERE {
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  ?Stolperstein wdt:P31 wd:Q26703203;
    wdt:P131 wd:Q2107;
                wdt:P547 ?Person.
                ?Person wdt:P570 ?tod

gives me only 88 results, but there are 188 "stones", so therefore in 100 datasets is the information date of death (P570) missing.