grep -i "my_regex"

This is the test data
This is the error data as follows
. . .
. . . .
. . . . . .
. . . . . . . . .
Error data ends

. . .
    . . . .
    . . . . . .
    . . . . . . . . .
    Error data ends

grep -i -B 10 'error' data

grep -i -A 10 'error data'

grep -i -A 10 "my_regex"