(select
 (filter
  (bgp
    (triple ?:x <http://example/p> ?::?25)
    (triple ?::?25 <http://example/v1> ?:v1)
    (triple ?::?25 <http://example/v2> ?:v2))
  (|\|\|| (:< ?:v1 ?:v2) (|\|\|| (> ?:v1 ?:v2) (= ?:v1 ?:v2))))
 (?:x ?:v1 ?:v2))