  The Full Event Interpretation is presented: a new exclusive tagging algorithm
used by the high-energy physics experiment Belle II. The experimental setup of
Belle II allows the precise measurement of otherwise inaccessible $B$ meson
decay-modes. The Full Event Interpretation algorithm enables many of these
measurements. The algorithm relies on machine learning to automatically
identify plausible $B$ meson decay chains based on the data recorded by the
detector. Compared to similar algorithms employed by previous experiments, the
Full Event Interpretation provides a greater efficiency, yielding a larger
effective sample size usable in the measurement.
