  We proceed to study the integrable structures of two-dimensional non-linear
sigma models defined on three-dimensional Schrodinger spacetimes. We show that
anisotropic Lax pairs are equivalent with isotropic Lax pairs with flat
conserved currents under non-local gauge transformations. Then a quite
non-trivial realization of the undeformed Yangian symmetry Y(sl(2)) is revealed
after an appropriate gauge fixing, which is determined by comparing the gauge
transformation to a quantum Jordanian twist. As a result, an exotic symmetry
found in arXiv:1209.4147 may be interpreted as a Jordanian deformation of
Y(sl(2)).
