Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Where is the 3rd subgroup of GRBs?   It is shown that in the duration-hardness plane the GRBs of the third
intermediate subgroup are well defined. Their durations are intermediate (i.e.
roughly between 2 and 10 seconds), but their hardnesses are the lowest. They
are even softer than the long bursts.

35
The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: eess
2
The categories of this paper are: math
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom