Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gaia DR2 confirms that candidate Thorne-\.Zytkow object HV 2112 is in
  the SMC   The Gaia DR2 proper motion places HV 2112 in the Small Magellanic Cloud
(SMC), consistent with it being a Thorne-\.Zytkow object.

35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph