prefix : <https://example.org/vocab/>
base <https://example.org/>

<< </item/1> a :Thing >> :addedIn <v1> ; :removedIn <v3> .

</item/1> :hasTitle _:title .
<< _:title :mainTitle "Item 1" >> :addedIn <v1>; :removedIn <v2> .

<v1> :added << </item/1> a :Thing >> ,
    << _:title :mainTitle "Item 1" >> .