TAP hwalk

My tree walk function ("hwalk") not works for TAP.
The allowed questions now include
    subject verb ?;
    ? verb object;
where verb includes
    isa*  iss*  isu*
    isc*  isg*  isp*

Here's an example: all SuperClasses & SubClasses of Person

##### ready for new knowledge #####
##### use <do menu done;> for MKE input menu #####
##### use <exit;> or <EOF> to exit ke #####
##### parse_file &input  KFORMAT <ku> #####
ke$ set echo=off,kbmode=tap;
# assignment <set echo = off;>
ke$ Person iss* ?;
Person
/  Agent
//    Resource
ke$ Person isg* ?;
Person
/  Architect
/  Artist
//    Actor
//    Chef
//    Choreographer
//    Comedian
//    Composer
//    MovieDirector
//    Musician
//    Painter
/  Athlete
/  Author
//    Philosopher
/  Bureaucrat
/  CMUFaculty
/  CMUGraduateStudent
/  CMUPerson
//    CMUFaculty
//    CMUGraduateStudent
//    CMU_RAD
/  CMU_RAD
/  Celebrity
/  CorporateExecutive
/  Criminal
/  Employee
//    CMUPerson
///      CMUFaculty
///      CMUGraduateStudent
///      CMU_RAD
//    W3CPerson
/  Engineer
/  FashionModel
/  FireFighter
/  Lawyer
//    DistrictAttorney
//    Judge
/  Leader
//    SportsTeamCoach
//    SportsTeamManager
/  MedicalDoctor
/  Musician
/  Painter
/  Philosopher
/  Politician
//    CityMayor
//    DeputyDistrictAttorney
//    DistrictAttorney
//    PoliticalChairman
//    PoliticalDirector
//    PoliticalPresident
//    PoliticalSecretaryGeneral
//    Premier
//    PrimeMinister
//    StateGovernor
//    UnitedStatesCongressman
//    UnitedStatesPresident
//    UnitedStatesPresidentialCabinetMember
///      UnitedStatesAttorneyGeneral
///      UnitedStatesNationalSecurityAdvisor
///      UnitedStatesSecretaryOfAgriculture
///      UnitedStatesSecretaryOfCommerce
///      UnitedStatesSecretaryOfDefense
///      UnitedStatesSecretaryOfEducation
///      UnitedStatesSecretaryOfEnergy
///      UnitedStatesSecretaryOfHealthAndHumanSvcs
///      UnitedStatesSecretaryOfHousingAndUrbDev
///      UnitedStatesSecretaryOfLabor
///      UnitedStatesSecretaryOfState
///      UnitedStatesSecretaryOfTheInterior
///      UnitedStatesSecretaryOfTransportation
///      UnitedStatesSecretaryOfTreasury
///      UnitedStatesSecretaryOfVeteransAffairs
//    UnitedStatesSenator
///      UnitedStatesSenateMajorityLeader
///      UnitedStatesSenateMinorityLeader
//    UnitedStatesVicePresident
/  Publicist
/  Scientist
//    Chemist
//    ComputerScientist
//    MedicalScientist
//    Physicist
/  Terrorist
ke$

Dick McCullough
knowledge := man do identify od existent done;
knowledge haspart proposition list;