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