m1 =. noun define
    # This rules file is extracted from Wikipedia:
    # http://en.wikipedia.org/wiki/Markov_Algorithm
    A -> apple
    B -> bag
    S -> shop
    T -> the
    the shop -> my brother
    a never used -> .terminating rule
)

   m1 markov 'I bought a B of As from T S.'
I bought a bag of apples from my brother.