[lojban-beginners] poi or noi?

[Jens Gutzeit <lojban@65536.org>]

coi rodo

In "Lojban for Beginners" (chapter 9/ke'a), you can find the
exercise to form some relative clauses:

{mi kakne lenu citka loi cidjrkari .i lenu citka loi cidjrkari
cu nandu} becomes {mi kakne lenu citka loi cidjrkari kei poi
(ke'a) nandu}

As far as I understand this sentence it is a non-restrictive
relative clause, since being difficult is just an additional
information. But then you have to use {noi} instead of {poi}.
Am I wrong? Was {poi} used instead of {noi}, because {noi}
is introduced later?

By the way, the best translation for "Thanks in advance" I can
manage is {mi ckire do lenu ba danfu le mi preti}. I know {ki'e},
but how do I translate the "in advance"?

mu'o mi'e .iens.