WoW:API GetQuestLogLeaderBoard
This function returns up to 3 values:
local title, type, done GetQuestLogLeaderBoard(i)
Where "i" is the index of the quests objectives (see GetNumQuestLeaderBoards ). title is something like: "Kill foo: 0/3" type could be the following things: "item" or "monster" and done is nil if this sub objective is not completed yet, else it is 1