Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New developments of photodetectors for the Lake Baikal Neutrino
  Experiment   New developments of photodetectors for the lake Baikal neutrino experiment
are described. Some test results of photodetectors at the lake Baikal are
presented.

28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ