const { n3reasoner } = require('eyereasoner')
const { Parser } = require('n3')
const $rdf = require('rdf-ext@1.3.5')
const data =`
PREFIX : <http://example.com/>
:object1 :Title :title1.
:title1 :Type :type1.
:object2 :Title :title2.
:object3 :Title :title3.
:title3 :Type :type3.
@prefix log: <http://www.w3.org/2000/10/swap/log#>.
@prefix : <http://example.com/>.
{
{
?object :Title ?title.
} log:callWithOptional {
?title :Type ?type.
}.
?type log:bound false.
} => {
?object :TitleWithoutType ?title.
}.`
await n3reasoner(data)
Created from: https://npm.runkit.com/