Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proceedings of the 27th International Symposium on Graph Drawing and
  Network Visualization (GD 2019)   This is the arXiv index for the electronic proceedings of GD 2019, which
contains the peer-reviewed and revised accepted papers with an optional
appendix. Proceedings (without appendices) are also to be published by Springer
in the Lecture Notes in Computer Science series.

0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org