United Kingdom Member of Parliament (E228)

# Based on https://www.wikidata.org/wiki/EntitySchema:E134

PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
PREFIX ps: <http://www.wikidata.org/prop/statement/>
PREFIX p: <http://www.wikidata.org/prop/>

# Example SPARQL queries:
# SELECT ?person WHERE { ?person wdt:P31 wd:Q5; wdt:P39 [ wdt:P279 wd:Q16707842 ] } limit 5
# SELECT DISTINCT ?id WHERE { VALUES ?id { wd:Q180589 wd:Q6383803 wd:Q269322 } }

start = @<UnitedKingdomMP>

<UnitedKingdomMP> EXTRA wdt:P106 p:P39 {
  wdt:P31   [ wd:Q5 ] ;          # instance of human
  wdt:P106  [ wd:Q82955 ] ;      # occupation politician
  p:P39     @<PositionHeld> +;   # position held subclass of Member of Parliament
}

<PositionHeld> {
   ps:P39  @<subclass-of-mp> ;
   pq:P580 xsd:dateTime ;
   pq:P4100 @<parliamentary-group> ;
   pq:P768 @<electoral-district> ;
   pq:P2715 @<elected-in> ;
   pq:P2937 @<parliamentary-term> ;
   (
      pq:P1534 @<end-cause> +;   # if there is an end cause there
      pq:P582 xsd:dateTime +;    # must be an end date, and vice versa
   )* ;
}

<subclass-of-mp> {
    wdt:P279 [ wd:Q16707842 ]; # subclass of "Member of Parliament"
}

<end-cause> {
    # Instance of an "end cause" or "Wikidata end cause"
    # These should probably be harmonised, but for now accept either.
    wdt:P31 [ wd:Q22087155 wd:Q66593009  ]; 
}

<electoral-district>  {
   wdt:P31 [ wd:Q27971968 ]; # Commons constituency
}

<elected-in> EXTRA wdt:P31 {
  wdt:P31 [ wd:Q15283424 wd:Q7864918 ]; # election or by-election
}

<parliamentary-term> {
  wdt:P31 [ wd:Q21094819 ]; # UK Parliament term
}

<parliamentary-group> EXTRA wdt:P31 wdt:P17 {
    wdt:P31 @<subclass_of_political_organization>+;
    wdt:P17 [ wd:Q145 ]     # country = UK
}

# This seems to be needed for a P31/P279* equivalent?
#   https://lists.w3.org/Archives/Public/public-shex/2018Jun/0004.html
<subclass_of_political_organization> {
  (
    (wdt:P279 [wd:Q7210356]; wdt:P279 .*) |
    (wdt:P279 @<subclass_of_political_organization>; wdt:P279 .*)
  )
}