  An exclusive analysis of the 4-body final states $\mathrm{\Lambda + p +
\pi^{+} + K^{0}}$ and $\mathrm{\Sigma^{0} + p + \pi^{+} + K^{0}}$ measured with
HADES for p+p collisions at a beam kinetic energy of 3.5 GeV is presented. The
analysis uses various phase space variables, such as missing mass and invariant
mass distributions, in the four particle event selection (p, $\pi^+$, $\pi^+$,
$\pi^-$) to find cross sections of the different production channels,
contributions of the intermediate resonances $\mathrm{\Delta^{++}}$ and
$\mathrm{\Sigma(1385)^{+}}$ and corresponding angular distributions. A dominant
resonant production is seen, where the reaction $\mathrm{\Lambda + \Delta^{++}
+ K^{0}}$ has an about ten times higher cross section
($\mathrm{29.45\pm0.08^{+1.67}_{-1.46}\pm2.06\,\mu b}$) than the analogous
non-resonant reaction ($\mathrm{2.57\pm0.02^{+0.21}_{-1.98}\pm0.18\,\mu b}$). A
similar result is obtained in the corresponding $\Sigma^{0}$ channels with
$\mathrm{9.26\pm0.05^{+1.41}_{-0.31}\pm0.65\,\ mu b}$ in the resonant and
$\mathrm{1.35\pm0.02^{+0.10}_{-1.35}\pm0.09\,\mu b}$ in the non-resonant
reactions.
