Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: How can astrotourism serve the sustainable development goals? The
  Namibian example   Astrotourism brings new opportunities to generate sustainable socio-economic
development, preserve cultural heritage, and inspire and educate the citizens
of the globe. This form of tourism can involve many different activities, such
as visiting observatories or travelling to remote areas to experience an
evening under a pristine, dark night sky. Together, our UK-Namibian
collaboration is working to develop and showcase astrotourism in Namibia, and
to enhance the possibility for astrotourism worldwide.

12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat