Cy D Fect Looking Forward To The Day When He Will Rise In The Organization Gives Aqu 661642

Cy D. Fect, looking forward to the day when he will rise in the organization, gives aquery to find all the wheels:

(wheel ?who)

To his surprise, the system responds

;;; Query results:

(wheel (Warbucks Oliver))

(wheel (Bitdiddle Ben))

(wheel (Warbucks Oliver))

(wheel (Warbucks Oliver))

(wheel (Warbucks Oliver))

Why is Oliver Warbucks listed four times?