  We measured the ratios of electroproduction cross-sections from a proton
target for three exclusive meson-baryon final states: $\Lambda K^+$, $p\pi^0$,
and $n\pi^+$, with the CLAS detector at Jefferson Lab. Using a simple model of
quark hadronization we extract q-qbar creation probabilities for the first time
in exclusive two-body production, in which only a single q-qbar pair is
created. We observe a sizable suppression of strange quark-antiquark pairs
compared to non-strange pairs, similar to that seen in high-energy production.
