while( sem.count > 0 && q1x.ans == null && q20.ans == null ) {
                    sem.wait();
                }
            }
        } catch( InterruptedException ie ) {
            throw new UnknownHostException( name );
        }
        if( q1x.ans != null ) {
            return q1x.ans;
        } else if( q20.ans != null ) {
            return q20.ans;
        } else {
            throw q1x.uhe;