insert { <http://example/b02> example:ib 1 }
delete { <http://example/b02> example:ib 1 }
insert { <http://example/b02> example:ib 2 }
insert { <http://example/b02> example:sb "s1" }
delete { <http://example/b02> example:sb "s1" }
insert { <http://example/b02> example:sb "s2" }
