my %PG;
my $cou = 0;

local $/ = 'Startpoint';
RECORD:
while (<INFILE1>) { 

    next RECORD unless  # unless valid data extracted from record
        /[(](\w+)[^(]+[(](\w+)[^:]+:\s+(\w+).*?slack[^-]+(-\S+)/s; 
       
    $PG{$3}{"$1-$2"}{$cou} = $4; 
    $cou++;
    
    }