Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quark Spin and Orbital Angular Momentum in the Chiral Quark Model   Quark spin and orbital angular momentum in the nucleon are calculated in
symmetry-breaking chiral quark model. The results are compared with data and
other models.

16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg