I'm on Windows and have only heard of linuxes awk etc so I can only imagine that this is possible without actual scripting:
I have data like
.. 162 42 A single serving 162 62 of french fries, please 164 -1 ABC 164 -1 1 ..
that I would like to be turned into
.. A single serving of french fries, please ..
so the rule would be
merge third columns for identical first columns when second column >= 0.
I'll try to find awk for Windows.