sentences:  The students carried on a regular sit-in and within two months, the sit-in movement spread to 54 cities in nine states; Woolworth's eventually agreed to desegregate its lunch counters, and other restaurants in Southern towns and cities followed suit.A darker racial incident in 1979 was called the Greensboro massacre.In this incident the predominantly African American Communist Workers Party (CWP) led a march protesting the Ku Klux Klan and other white-supremacist groups through a black neighborhood in southeastern Greensboro.