Complex sentence: In the spring of 1961, integrated teams of civil rights activists mounted what they called "Freedom Rides" to highlight the illegal imposition of racial segregation on interstate buses, whose operations came under federal law and the constitution.
Split into simpler sentences: In the spring of 1961, integrated teams of civil rights activists mounted what they called "Freedom Rides". To highlight the illegal imposition of racial segregation on interstate buses, whose operations came under federal law and the constitution.