Are secondary sources, and do<span>not report new or original experimental work.</span>
Independent clause is the answer.
Martin Luther King, Jr. is such as important character not only in American, but in global society, because thanks to him may, unlike him, could live in a world where social status and, mainly, skin colour were not important. In other words, the impact of his acts influenced thousands of people.
Nevertheless, it is important to state that King was not alone in his fight for equality. So that, when recieving Nobel Prize, King gave a speech in which in a metaphorical way he thanked and recognised the work that other participants of the Freedom Movement had made. In this way, the well operation of an airplaine depends not only on the machine by itself, and neither on the pilot; but there are people on land managing and controlling so many different things that make possible the goal of transporting the plane and people to the destination successful. In that way, the plane can be related to the movement itself and King considered only as a pilot who need many other people working hard to achieve the destination that would be freedom.