Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exotic hadrons: review and perspectives   The physics of exotic hadrons is revisited and reviewed, with emphasis on
flavour configurations which have not yet been investigated. The constituent
quark model of multiquark states is discussed in some detail, as it can serve
as a guide for more elaborate approaches.

24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg