The proper format is

No one really "said" it; it is the equation that represents Einstein's Theory of Relativity.
During the 1930s, the combination of the Great Depression and the memory of tragic losses in World War I contributed to pushing American public opinion and policy toward isolationism. Isolationists advocated non-involvement in European and Asian conflicts and non-entanglement in international politics.
Answer:
Regulatory Marker
Explanation:
Danger: A white buoy or sign with an orange diamond warns boaters of danger – rocks, dams, rapids, etc. ... Controlled Area: A white buoy or sign with an orange circle and black lettering indicates controlled or restricted areas on the water.
Regulatory markers are another buoy on the lakes and rivers of Georgia.The use orange marking and black lettering on a white buoy to warns the hazards and the obstruction or to give direction and information. They also mark closed area.
The restricted buoy is white one that has an orange circle in which there is black lettering. It also has the orange circling at the top and the bottom of the buoy. this tells of an area where there are navigational rules. No Speeding, No Fishing, No Anchoring and No Skiing is the common examples.