  We discuss the Hopf-Wess-Zumino term in the effective action of the 6d (2, 0)
theory of the type A_{N-1} in a generic Coulomb branch. For such terms, the
supergravity calculation could be trusted. We calculate the WZ term on
supergravity side and show that it could compensate the anomaly deficit, as is
required by the anomaly matching condition. In contrast with the SYM theory, in
which each WZ term involves one root e_{i}-e_{j}, here, the typical WZ term
involves two roots e_{i}-e_{j} and e_{k}-e_{j}. Such kind of triple interaction
may come from the integrating out of the massive states carrying three indices.
A natural candidate is the recently proposed 1/4 BPS objects in the Coulomb
phase of the 6d (2, 0) theories. The WZ term could be derived from the field
theory by the integration out of massive degrees of freedom. Without the 6d (2,
0) theory at hand, we take the supersymmetric equations for the 3-algebra
valued (2, 0) tensor multiplet as the prototype to see how far we can go. The
H_{3}\wedge A_{3} part of the WZ term is obtained, while the A_{3}\wedge F_{4}
part, which is the term accounting for the anomaly matching, cannot be produced
by the standard fermion loop integration.
