One of the least constrained contributions to the neutral current
(NC) elastic neutrino-proton cross section is the strange axial form factor,
which represents the strange quark spin contribution to the spin structure of
the proton. This becomes the net strange spin contribution, Δs, in the
limit when the negative four-momentum transfer squared (Q2) is zero. The
strange axial form factor can be determined by studying NC elastic scattering
events in the MicroBooNE detector. MicroBooNE's unique ability to detect
low-energy protons is expected to allow the reconstruction of these events with
a Q2 as low as 0.10 GeV2 and to determine the strange axial form factor
in a model-independent approach. We present a selection of neutral current
elastic events in a subset of MicroBooNE neutrino data, as well as our plan to
extract the strange part of the axial form factor and Δs from this
selection in the full data set.