Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Global millimeter VLBI array survey of ultracompact extragalactic radio
  sources at 86 GHz
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys