Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for Massive Black Holes in Nearby Galactic Nuclei   Masses of black holes in nearby galactic nuclei can be measured in a variety
of ways, using stellar and gaseous kinematics. Reliable black hole masses are
known for several dozen objects, so that demographic questions can start to be
addressed with some confidence. Prospects for the near future are discussed
briefly.

1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin