So far, so good. There is in fact one other requirement: Patience. ($1 = 0.8432 euros) We have just measured one, it fits the required criteria in length and diameter. It was made by architect Viollet-le-Duc in 1859.
The agent is not a human.
( z0 human :domain ( z1 agent ) :polarity - )
(z0 / human
    :domain (z1 / agent)
    :polarity -)
The agent is not a human .
z0 :polarity 0
z0 :domain z1