Complex sentence: The Australian Greens, at present seen as being the "third force" in Australian politics, is a left-wing and environmentalist party, generally achieving 7--13% of votes in elections conducted after 2004.
Split into simpler sentences: The Australian Greens, at present seen as being the "third force" in Australian politics, is a left-wing and environmentalist party. Greens are generally achieving 7--13% of votes in elections conducted after 2004.