Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast Light, Fast Neutrinos?   In certain media, light has been observed with group velocities faster than
the speed of light. The recent OPERA report of superluminal 17 GeV neutrinos
may describe a similar phenomenon.

21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph