#!/bin/perl -w

open IN,"gzip -dc $ARGV[0] |";
local $/="//\n";
while(<IN>){
    chomp;
    my ($AC, $entry_id, $goid) = ("-","-","-");
    ($AC)=$_=~/\nAC   ([^;]+)/;
    ($entry_id)=$_=~/\nDR   GeneID; (\d+)/ if /\nDR   GeneID;/;
    if(/\nDR   GO; GO:\d+/){
        my @go=$_=~/\nDR   GO; (GO:\d+)/g ;
        my %hash;
        my @unique = grep { !$hash{$_}++ } @go;
        $goid=join(";",@unique);
    }
    print  "$AC\t$entry_id\t$goid\n";
}

close IN;