Steps to Reproduce:

1. Check that item ambassador's residence exists at https://www.wikidata.org/wiki/Q47163308
2. Go to https://www.wikidata.org
3. In the search box, type: ambassador residence

Actual Results:
"No match was found"

Expected Results:
Item Q47163308 should be listed

The indexer should split on apostrophes, to match both ambassador's and ambassador.