The question that your student asked, related to one of important issue in
International Merchandise Trade Statistics (IMTS): Goods for Processing, as
well as goods resulting from the processing (GfP). Even though, it is
recommended that GfP to be included in exports and exports, however, to
explicitly identify  (separately record) this trade may not be
internationally comparable as (a) IMTS compilers may not have adequate
sources of data (especially when inward/outward processing customs
procedures are not used), (b) national definitions of such procedures may
significantly differ.

In UN Comtrade, Export can be broken down into two: re-export and domestic
export. However, there is no further detailed break down. GfP can be part
of re-export or export (depending whether the goods resulting from the
processing change its origin or not).

I think that you should try to contact National Statistics Offices
requesting detailed breakdown on export after inward processing.