@prefix : <http://example/> .
@prefix  xsd:    <http://www.w3.org/2001/XMLSchema#> .

:x1 :p  "a" ; :q 1 .
:x2 :p  _:b ; :q "1".
:x3 :p  :a ; :q "1".
:x4 :p  1 ; :q 2 .
:x5 :p  1.0 ; :q 2 .
:x6 :p  "1" ; :q "2" .
:x7 :p  "1"^^xsd:string ; :q "2" .
:x8 :p  "1"^^xsd:string ; :q 2 .