http://gatherer.wizards.com/Pages/Card/Details.aspx?name=korozda+monitor

Scavenge 5 (G)(G) ( (5(G)(G), Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

I would like to know why the 5(G)(G) is listed twice, outside of the parentheses and inside. I've seen this format on other cards too.