A commission established in 1987 has sponsored what events every four years since 1988?

A Columbia Law School graduate, who married museum designer Edwin Schlossberg in 1986? Which word means both a column of smoke and a feather? Which comic dramatist lived from about 446 to 386 B.C.? A 1937 commemorative half dollar honored which bloodiest one-day battle of the Civil War? Which common adverb is also the acronym of a large feminist group? Which common mineral is used to make plaster of Paris? What is a common name for trefoil, a plant with three leaflets? Which Communist leader said in 1938, "Political power grows out of the barrel of a gun"?