In what city, commonly referred to as "the District", showed a play from January 19-24, 1931 at the National Theatre entitled Green Grow the Lilacs? 
Green Grow the Lilacs (play): Green Grow the Lilacs is a 1930 play by Lynn Riggs named for the popular folk song of the same name. Green Grow the Lilacs (play):  It also played January 19–24, 1931, at the National Theatre in Washington, D.C. The play is the basis of the 1943 musical "Oklahoma! Washington, D.C.: Washington, D.C., formally the District of Columbia and commonly referred to as "Washington", "the District", or simply "D.C.", is the capital of the United States.
Washington, D.C.