insert { <a01> example:i1 1 }
delete { <a01> example:i1 1 }
insert { <a01> example:i1 2 }
insert { <a01> example:i2 1 }
delete { <a01> example:i2 1 }
insert { <a01> example:i2 2 }
insert { <a01> example:single1 1 }
delete { <a01> example:single1 1 }
insert { <a01> example:single1 2 }
