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$VAR1->{ETPT}
$VAR1->{ETPT}{SERVER}
$VAR1->{ETPT}{SERVER}[0]{RESPONSE} # First element of the array $VAR1->{ETPT}{SERVER}[1]{RESPONSE} # Second element of the array
for (@{$VAR1->{ETPT}{SERVER}}) { # here $_->{RESPONSE} is each response of the array }