Observation of the decay B→FX

We present evidence for inclusive F-meson production in B-meson decay. The product branching fraction B(B→FX)B($F^{+}$→φ${\pi }^{+}$) is measured to be 0.0038±0.010. The F momentum spectrum indicates the presence of a large component of two-body final states in the decay B→FX.