Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polygonal walls and the astronomical alignments of the Acropolis of
  Alatri, Italy: a preliminary investigation   The astronomical orientation of the acropolis of Alatri, Italy, is analyzed.
The results support the idea that this town, with its magnificent polygonal
walls, was constructed well before the Roman expansion.

22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess