Discover 'john' in cat.msg:
    DOC (1): Hello John

Discover 'you' in cat.msg:
    DOC (7): See you
    DOC (6): It was nice to talk with you.
    DOC (5): Nice, thank you.
    DOC (4): I'm fine, thank you. How do you do?
    DOC (3): How do you do?

Discover 'hello' in cat.msg:
    DOC (2): Hello Jane
    DOC (1): Hello John