  We discuss the gravitational wave emission and the orbital evolution of a
hierarchical triple system composed of an inner binary black hole (BBH) and an
outer tertiary. Depending on the kick velocity at the merger, the merged BBH
could tidally disrupt the tertiary. Even though the fraction of BBH mergers
accompanied by such disruptions is expected to be much smaller than unity, the
existence of a tertiary and its basic parameters (e.g. semimajor axis,
projected mass) can be examined for more than 1000 BBHs with the space GW
detector LISA and its follow-on missions. This allows us to efficiently
prescreen the targets for the follow-up searches for the tidal disruption
events (TDEs). The TDE probability would be significantly higher for triple
systems with aligned orbital- and spin-angular momenta, compared with random
configurations.
