Making a tree out of a 2 column list

[Sebastian Bassi]

On 15 Apr 2007 15:44:47 -0700, bearophileHUGS at lycos.com
<bearophileHUGS at lycos.com> wrote:
> But errors and bugs do happen, inside data too; so often it's better
> to be on safe side if the safe code is fast enough.

Yes, I agree since I've seen lot of errors in data. But this data
comes from a taxonomy tree made by the NCBI, that is why I assume the
data is right.