I have a question I would like to ask here because up to now I haven't found a clear solution for this. 

I want to see my contacts in Personal Brain but I don't see how one has to insert them, for example my school contacts are under my school thought, however if a friend of mine has a sister is she a child or jump thought? this kind of relationship is not very clear.

I would appreciate your ideas and how you handle this.

I think the context of the relationship is based on school contacts. If it was a family, it would be easier, as both would be children of each parent. However, in this case, I would lean towards linking her to your friend as a jump thought. If at some point this doesn't work, you can always change it.
Windows 7
OSX 10.6.3
Java SE 6

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