Ciao guys,

I'm trying to solve the following problem but I'm not sure if perl it's the right tool for it. My data look like this: 

Buenos    -    SPN    Buenos    B-GPE
Aires    -    SPN    Aires    I-GPE
Afghanistan    -    SPN    Afghanistan    B-GPE
Europa    -    SPN    Europa    B-GPE
UE    -    I    UE    B-GPE
Italia    -    SPN    Italia    B-GPE
Provincia    -    SS    Provincia    B-GPE
di    -    E    di    I-GPE
Lucca    -    SPN    Lucca    I-GPE
...

[download]

As yoou can see, whene there is an I-GPE it means that the name has to be composed whit the line before (i.e. Buenos Aires); when you have just B-GPE and the following line is also B-GPE, than it means they are different names.

Problem is the file is very big and I can't slurp it all at once.

I would like an output like the following 

Buenos Aires
Afghanistan
Italia
...
Provincia di Lucca

[download]

Someone has any idea?

One of Crete's own prophets has said it: 'Cretans are always liars, evil brutes, lazy gluttons'.
He has surely told the truth.

In reply to Condition on multiple lines and big file by epimenidecretese

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