added example interrogate()
added example interrogate()


Former-commit-id: ba3a288857c2245eeee6269712036ac804cf7724 [formerly 805307956fa1ffb7ea447ab66b5470be283cca25]
Former-commit-id: ff5ea854027adf5bbfc999030d4b3b56b005071f
interrogator/corpkit,interrogator/corpkit