Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonthermal Radiation of the Crab Nebula   The radiation mechanisms contributing to formation of the nonthermal spectrum
of the Crab Nebula, as well as the information that could be derived from
future observations in different energy bands, are discussed.

20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math