Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dileptons and Photons at the CERN SPS   The paper reviews all experimental results on dileptons with invariant mass m
< 3 GeV/c$^2$ and real photons obtained from the CERN SPS heavy-ion program
with S and Pb beams, together with the current attempts to understand them.

12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess