extract lines with regexp

[Sebastien LE MAGUER]

Hi,

I wonder how to extract lines using a regexp. My file contains something 
like that :

<useless lines>
<line X>
theq() :
<useless lines>

and I want to extract all lines before theq (here line X)

does anyone have an idea ?

Thanks

Sebastien

Sebastien_Le_maguer.vcf
Description: Vcard