Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the B^0 --> pi^-ell^+nu and B^+ --> eta^(')ell^+nu
  Branching Fractions, the B^0 --> pi^-ell^+nu and B^+ --> eta ell^+nu
  Form-Factor Shapes, and Determination of |V_{ub}|
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an