void main()
{
    object oActor;

    // Get the creature who triggered this event.
    object oPC = GetEnteringObject();

    // Only fire for (real) PCs.
    if ( !GetIsPC(oPC)  ||  GetIsDMPossessed(oPC) )
        return;

    // Only fire once.
    if ( GetLocalInt(GetModule(), "DO_ONCE__" + GetTag(OBJECT_SELF)) )
        return;
    SetLocalInt(GetModule(), "DO_ONCE__" + GetTag(OBJECT_SELF), TRUE);

    // Have the PC perform a sequence of actions.
    AssignCommand(oPC, ClearAllActions());

    // Have "olsentinelx" perform a sequence of actions.
    oActor = GetObjectByTag("olsentinelx");
    AssignCommand(oActor, ActionMoveToObject(oPC));

    // Have "olsentinelx" say something.
    AssignCommand(GetObjectByTag("olsentinelx"), SpeakString("Halt and speak with me!"));

    // Have "olsentinelx" strike up a conversation with the PC.
    oActor = GetNearestObjectByTag("olsentinelx", oPC);
    DelayCommand(1.5, AssignCommand(oActor, ActionStartConversation(oPC)));
}