1 Discover 'john' in cat.msg:

     2     DOC (1): Hello John

     3 

     4 Discover 'you' in cat.msg:

     5     DOC (7): See you

     6     DOC (6): It was nice to talk with you.

     7     DOC (5): Nice, thank you.

     8     DOC (4): I'm fine, thank you. How do you do?

     9     DOC (3): How do you do?

    10 

    11 Discover 'hello' in cat.msg:

    12     DOC (2): Hello Jane

    13     DOC (1): Hello John

    14