Complex sentence: This is called negative parliamentarism, as opposed to the principle of positive parliamentarism--as in Germany and some other parliamentary systems--a government needs to achieve a majority through a vote of confidence in parliament.
Split into simpler sentences: This is called negative parliamentarism, as opposed to the principle of positive parliamentarism, which they have in some other parliamentary systems, for instance Germany. Under the principle of positive parliamentarism a government needs to get a majority through a vote of confidence in parliament.