(2 'Root' =
(0 'From' =
(0 'From1' = [aap])
(1 'From2' =
(0 'From2A' = [hello])
(1 'From2B' = [world])
)
{
(2 'From3' = [noot])
(2 'From3' = [mies])
}
(1 'To' =
(0 'To1' = [wim])
(2 'To3' = [hello])
(2 'To3' = [zus])