I have a file test.txt with the following information

start
id 10 
address Richmond 
name jack 
xxxxx
aaaaa
lastname black 
yyyy
zzzzz
id 11
address Central
name rick 
cccccc
dddddd
lastname hanna
eeeee
yyyyy
id 12
address denver 
name jack
sssss
tttttt
lastname strong
rrrrr
mmmmm
id 13
address Virginia 
name mick 
aaaaaaa
ooooooo
lastname jagger
gggggg
hhhhhh
id 14 
address Maine
name rick
sssss
sssss
lastname stewart
ssssss
ffffff
end
[download]

Now I want to search for a particular first name , say jack, and it should return the following information:

id 10 
address Richmond 
name jack 
lastname black 
id 12
address denver 
name jack 
lastname strong
[download]

How can i get this information -- this is getting the previous two lines from the actual pattern and also some information a particular number of lines after the patten ?

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